{"id":29161,"date":"2025-08-17T12:49:30","date_gmt":"2025-08-17T05:49:30","guid":{"rendered":"https:\/\/dps.media\/check-ten-mien-kiem-tra-ten-mien-website-mien-phi\/"},"modified":"2025-08-17T12:49:41","modified_gmt":"2025-08-17T05:49:41","slug":"check-domain-name-verify-website-domain-for-free","status":"publish","type":"post","link":"https:\/\/dps.media\/en\/check-domain-name-verify-website-domain-for-free\/","title":{"rendered":"Check domain name &amp; check website domain name for free"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><p><!-- DNS Bulk Lookup Widget - DPS.MEDIA Branded v\u1edbi CSS Isolated -->\r\n<\/p><div id=\"dnsBulkWidget\"><\/div><script>\r\n(function(){\r\n  const root = document.getElementById('dnsBulkWidget');\r\n  if (!root) return;\r\n\r\n  const POPULAR = ['A','CNAME','MX','NS','TXT'];\r\n  const RECORDS = ['ALL', ...POPULAR];\r\n  const TYPE_CODE = { A:1, CNAME:5, MX:15, NS:2, TXT:16 };\r\n\r\n  \/\/ T\u1ea1o CSS c\u00f4 l\u1eadp v\u1edbi prefix\r\n  const widgetStyles = `\r\n    #dnsBulkWidget {\r\n      all: initial !important;\r\n      font-family: system-ui, -apple-system, \"Segoe UI\", Roboto, Arial, sans-serif !important;\r\n    }\r\n    \r\n    #dnsBulkWidget *,\r\n    #dnsBulkWidget *::before,\r\n    #dnsBulkWidget *::after {\r\n      box-sizing: border-box !important;\r\n      margin: 0 !important;\r\n      padding: 0 !important;\r\n      border: none !important;\r\n      background: none !important;\r\n      outline: none !important;\r\n      text-decoration: none !important;\r\n      list-style: none !important;\r\n      font: inherit !important;\r\n      color: inherit !important;\r\n      vertical-align: baseline !important;\r\n      line-height: normal !important;\r\n    }\r\n\r\n    \/* Container ch\u00ednh *\/\r\n    #dnsBulkWidget .dns-container {\r\n      max-width: 1000px !important;\r\n      margin: 24px auto !important;\r\n      padding: 0 !important;\r\n      border: 1px solid #e5e7eb !important;\r\n      border-radius: 16px !important;\r\n      font-family: system-ui, -apple-system, \"Segoe UI\", Roboto, Arial, sans-serif !important;\r\n      overflow: hidden !important;\r\n      box-shadow: 0 10px 25px -5px rgba(21,21,119,0.1), 0 4px 6px -2px rgba(21,21,119,0.05) !important;\r\n      background: #ffffff !important;\r\n    }\r\n\r\n    \/* Header *\/\r\n    #dnsBulkWidget .dns-header {\r\n      background: linear-gradient(135deg, #151577 0%, #1e1e7a 100%) !important;\r\n      padding: 20px !important;\r\n      color: white !important;\r\n      position: relative !important;\r\n      overflow: hidden !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-header-bg1 {\r\n      position: absolute !important;\r\n      top: -20px !important;\r\n      right: -20px !important;\r\n      width: 100px !important;\r\n      height: 100px !important;\r\n      background: rgba(255,255,255,0.05) !important;\r\n      border-radius: 50% !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-header-bg2 {\r\n      position: absolute !important;\r\n      bottom: -30px !important;\r\n      left: -30px !important;\r\n      width: 80px !important;\r\n      height: 80px !important;\r\n      background: rgba(50,181,97,0.15) !important;\r\n      border-radius: 50% !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-header-content {\r\n      position: relative !important;\r\n      z-index: 1 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-header-top {\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      justify-content: space-between !important;\r\n      margin-bottom: 8px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-header-left {\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      gap: 12px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-icon {\r\n      width: 40px !important;\r\n      height: 40px !important;\r\n      background: linear-gradient(135deg, #32b561, #28a555) !important;\r\n      border-radius: 12px !important;\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      justify-content: center !important;\r\n      font-size: 20px !important;\r\n      font-weight: bold !important;\r\n      color: white !important;\r\n      box-shadow: 0 4px 8px rgba(50,181,97,0.3) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-title {\r\n      margin: 0 !important;\r\n      font-size: 20px !important;\r\n      font-weight: 700 !important;\r\n      letter-spacing: -0.5px !important;\r\n      color: #fff !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-subtitle {\r\n      margin: 0 !important;\r\n      font-size: 13px !important;\r\n      opacity: 0.8 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-brand {\r\n      text-align: right !important;\r\n      font-size: 12px !important;\r\n      opacity: 0.7 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-brand-name {\r\n      font-weight: 600 !important;\r\n      color: #32b561 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-desc {\r\n      margin: 0 !important;\r\n      font-size: 13px !important;\r\n      opacity: 0.9 !important;\r\n      line-height: 1.4 !important;\r\n    }\r\n\r\n    \/* Main Content *\/\r\n    #dnsBulkWidget .dns-main {\r\n      padding: 20px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-main-layout {\r\n      display: flex !important;\r\n      flex-direction: column !important;\r\n      gap: 16px !important;\r\n      margin-bottom: 16px !important;\r\n    }\r\n\r\n    \/* Input Section *\/\r\n    #dnsBulkWidget .dns-input-section {\r\n      position: relative !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-textarea {\r\n      width: 100% !important;\r\n      padding: 12px !important;\r\n      border: 2px solid #e5e7eb !important;\r\n      border-radius: 12px !important;\r\n      resize: vertical !important;\r\n      font-family: monospace !important;\r\n      font-size: 13px !important;\r\n      box-sizing: border-box !important;\r\n      transition: border-color 0.3s !important;\r\n      background: #fafbfc !important;\r\n      color: #374151 !important;\r\n      min-height: 120px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-textarea:focus {\r\n      outline: none !important;\r\n      border-color: #151577 !important;\r\n      box-shadow: 0 0 0 3px rgba(21,21,119,0.1) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-count {\r\n      position: absolute !important;\r\n      top: 8px !important;\r\n      right: 12px !important;\r\n      background: rgba(21,21,119,0.9) !important;\r\n      color: white !important;\r\n      padding: 4px 8px !important;\r\n      border-radius: 6px !important;\r\n      font-size: 11px !important;\r\n      font-weight: 500 !important;\r\n    }\r\n\r\n    \/* Controls *\/\r\n    #dnsBulkWidget .dns-controls {\r\n      display: flex !important;\r\n      flex-direction: column !important;\r\n      gap: 12px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-label {\r\n      display: block !important;\r\n      font-size: 13px !important;\r\n      font-weight: 600 !important;\r\n      color: #151577 !important;\r\n      margin-bottom: 8px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-types {\r\n      display: flex !important;\r\n      flex-wrap: wrap !important;\r\n      gap: 6px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-type-btn {\r\n      padding: 8px 14px !important;\r\n      border: 1px solid #cbd5e1 !important;\r\n      border-radius: 10px !important;\r\n      background: #fff !important;\r\n      cursor: pointer !important;\r\n      font-size: 12px !important;\r\n      font-weight: 500 !important;\r\n      transition: all 0.3s !important;\r\n      color: #374151 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-type-btn:hover {\r\n      border-color: #151577 !important;\r\n      color: #151577 !important;\r\n      transform: translateY(-1px) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-type-btn.active {\r\n      background: linear-gradient(135deg, #151577, #1e1e7a) !important;\r\n      color: #fff !important;\r\n      border-color: #151577 !important;\r\n      box-shadow: 0 4px 12px rgba(21,21,119,0.25) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-type-btn.active:hover {\r\n      color: #fff !important;\r\n      transform: translateY(-1px) !important;\r\n    }\r\n\r\n    \/* Actions *\/\r\n    #dnsBulkWidget .dns-actions {\r\n      display: flex !important;\r\n      flex-wrap: wrap !important;\r\n      gap: 12px !important;\r\n      align-items: end !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-delay-section {\r\n      flex: 1 !important;\r\n      min-width: 140px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-delay-label {\r\n      display: block !important;\r\n      font-size: 12px !important;\r\n      color: #151577 !important;\r\n      font-weight: 500 !important;\r\n      margin-bottom: 4px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-delay-input-group {\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      gap: 6px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-delay-input {\r\n      width: 70px !important;\r\n      padding: 6px 8px !important;\r\n      border: 1px solid #cbd5e1 !important;\r\n      border-radius: 8px !important;\r\n      font-size: 12px !important;\r\n      transition: border-color 0.3s !important;\r\n      background: #fff !important;\r\n      color: #374151 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-delay-input:focus {\r\n      outline: none !important;\r\n      border-color: #151577 !important;\r\n      box-shadow: 0 0 0 3px rgba(21,21,119,0.1) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-delay-unit {\r\n      font-size: 12px !important;\r\n      color: #64748b !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-action-buttons {\r\n      display: flex !important;\r\n      gap: 8px !important;\r\n      flex-wrap: wrap !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn {\r\n      padding: 12px 20px !important;\r\n      border: none !important;\r\n      border-radius: 10px !important;\r\n      cursor: pointer !important;\r\n      font-weight: 600 !important;\r\n      font-size: 13px !important;\r\n      white-space: nowrap !important;\r\n      transition: all 0.3s !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-primary {\r\n      background: linear-gradient(135deg, #151577, #1e1e7a) !important;\r\n      color: #fff !important;\r\n      box-shadow: 0 4px 12px rgba(21,21,119,0.3) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-primary:hover {\r\n      transform: translateY(-1px) !important;\r\n      box-shadow: 0 6px 20px rgba(21,21,119,0.4) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-secondary {\r\n      border: 2px solid #dc2626 !important;\r\n      background: #fff !important;\r\n      color: #dc2626 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn:disabled {\r\n      background: #6b7280 !important;\r\n      cursor: not-allowed !important;\r\n      box-shadow: none !important;\r\n      transform: none !important;\r\n    }\r\n\r\n    \/* Status Bar *\/\r\n    #dnsBulkWidget .dns-status-bar {\r\n      display: flex !important;\r\n      gap: 10px !important;\r\n      flex-wrap: wrap !important;\r\n      align-items: center !important;\r\n      margin-bottom: 16px !important;\r\n      padding: 12px !important;\r\n      background: linear-gradient(90deg, #f8fafc, #f1f5f9) !important;\r\n      border-radius: 12px !important;\r\n      border: 1px solid #e2e8f0 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-small {\r\n      padding: 8px 14px !important;\r\n      border-radius: 8px !important;\r\n      cursor: pointer !important;\r\n      font-size: 12px !important;\r\n      font-weight: 500 !important;\r\n      transition: all 0.3s !important;\r\n      background: #fff !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-copy {\r\n      border: 1px solid #32b561 !important;\r\n      color: #32b561 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-copy:not(:disabled):hover {\r\n      background: #32b561 !important;\r\n      color: white !important;\r\n      transform: translateY(-1px) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-copy.success {\r\n      background: linear-gradient(135deg, #32b561, #28a555) !important;\r\n      color: #fff !important;\r\n      border-color: #32b561 !important;\r\n      box-shadow: 0 4px 12px rgba(50,181,97,0.3) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-clear {\r\n      border: 1px solid #cbd5e1 !important;\r\n      color: #374151 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-btn-clear:hover {\r\n      border-color: #151577 !important;\r\n      color: #151577 !important;\r\n      transform: translateY(-1px) !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-status-right {\r\n      flex: 1 !important;\r\n      min-width: 120px !important;\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      justify-content: end !important;\r\n      gap: 12px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-progress {\r\n      display: none !important;\r\n      background: #e2e8f0 !important;\r\n      border-radius: 10px !important;\r\n      height: 8px !important;\r\n      width: 120px !important;\r\n      overflow: hidden !important;\r\n      min-width: 80px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-progress-bar {\r\n      height: 100% !important;\r\n      background: linear-gradient(90deg, #151577, #32b561) !important;\r\n      width: 0% !important;\r\n      transition: width 0.3s !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-status {\r\n      font-size: 12px !important;\r\n      color: #151577 !important;\r\n      font-weight: 600 !important;\r\n      text-align: right !important;\r\n    }\r\n\r\n    \/* Error Display *\/\r\n    #dnsBulkWidget .dns-error {\r\n      display: none !important;\r\n      background: linear-gradient(135deg, #fef2f2, #fee2e2) !important;\r\n      border: 2px solid #fca5a5 !important;\r\n      color: #991b1b !important;\r\n      padding: 12px !important;\r\n      border-radius: 12px !important;\r\n      margin-bottom: 12px !important;\r\n      align-items: center !important;\r\n      gap: 10px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-error-icon {\r\n      font-size: 18px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-error-text {\r\n      font-weight: 500 !important;\r\n    }\r\n\r\n    \/* Results *\/\r\n    #dnsBulkWidget .dns-results {\r\n      overflow: auto !important;\r\n      max-height: 60vh !important;\r\n      border: 2px solid #e5e7eb !important;\r\n      border-radius: 12px !important;\r\n      background: #fafafa !important;\r\n      min-height: 120px !important;\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      justify-content: center !important;\r\n      color: #64748b !important;\r\n      font-style: italic !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-empty-state {\r\n      text-align: center !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-empty-icon {\r\n      font-size: 32px !important;\r\n      margin-bottom: 8px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-empty-text {\r\n      margin-bottom: 4px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-empty-subtext {\r\n      font-size: 11px !important;\r\n      color: #9ca3af !important;\r\n    }\r\n\r\n    \/* Table - Tr\u00e1nh d\u00f9ng th, td g\u1ed1c *\/\r\n    #dnsBulkWidget .dns-table {\r\n      width: 100% !important;\r\n      border-collapse: collapse !important;\r\n      font-size: 12px !important;\r\n      background: #fff !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table thead {\r\n      position: sticky !important;\r\n      top: 0 !important;\r\n      background: linear-gradient(135deg, #151577, #1e1e7a) !important;\r\n      z-index: 1 !important;\r\n      color: white !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header {\r\n      padding: 12px 15px !important;\r\n      font-weight: 600 !important;\r\n      font-size: 12px !important;\r\n      text-align: left !important;\r\n      background: inherit !important;\r\n      color: inherit !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header.center {\r\n      text-align: center !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table tbody .dns-table-row:nth-child(even) {\r\n      background: #f8fafc !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table tbody .dns-table-row:nth-child(odd) {\r\n      background: #ffffff !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-cell {\r\n      padding: 10px 15px !important;\r\n      border-bottom: 1px solid #f1f5f9 !important;\r\n      font-size: 12px !important;\r\n      word-break: break-all !important;\r\n      background: inherit !important;\r\n      color: inherit !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-cell.center {\r\n      text-align: center !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-cell.type {\r\n      font-weight: 600 !important;\r\n      color: #151577 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-cell.name {\r\n      font-family: monospace !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-cell.ttl {\r\n      font-family: monospace !important;\r\n      color: #32b561 !important;\r\n      font-weight: 500 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header-row {\r\n      display: flex !important;\r\n      background: linear-gradient(135deg, #151577, #1e1e7a) !important;\r\n      color: white !important;\r\n      position: sticky !important;\r\n      top: 0 !important;\r\n      z-index: 1 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-row {\r\n      display: flex !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header:nth-child(1),\r\n    #dnsBulkWidget .dns-table-cell:nth-child(1) {\r\n      flex: 2 !important;\r\n      min-width: 120px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header:nth-child(2),\r\n    #dnsBulkWidget .dns-table-cell:nth-child(2) {\r\n      flex: 0 0 80px !important;\r\n      text-align: center !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header:nth-child(3),\r\n    #dnsBulkWidget .dns-table-cell:nth-child(3) {\r\n      flex: 1.5 !important;\r\n      min-width: 100px !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header:nth-child(4),\r\n    #dnsBulkWidget .dns-table-cell:nth-child(4) {\r\n      flex: 0 0 60px !important;\r\n      text-align: center !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-table-header:nth-child(5),\r\n    #dnsBulkWidget .dns-table-cell:nth-child(5) {\r\n      flex: 2.5 !important;\r\n      min-width: 150px !important;\r\n    }\r\n\r\n    \/* Footer *\/\r\n    #dnsBulkWidget .dns-footer {\r\n      background: linear-gradient(135deg, #f8fafc, #f1f5f9) !important;\r\n      padding: 12px 20px !important;\r\n      border-top: 1px solid #e2e8f0 !important;\r\n      text-align: center !important;\r\n      font-size: 11px !important;\r\n      color: #64748b !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-footer-content {\r\n      display: flex !important;\r\n      align-items: center !important;\r\n      justify-content: center !important;\r\n      gap: 8px !important;\r\n      flex-wrap: wrap !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-footer-brand {\r\n      color: #151577 !important;\r\n      font-weight: 700 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-footer-link {\r\n      color: #32b561 !important;\r\n      text-decoration: none !important;\r\n      font-weight: 600 !important;\r\n    }\r\n\r\n    #dnsBulkWidget .dns-footer-link:hover {\r\n      text-decoration: underline !important;\r\n    }\r\n\r\n    \/* Mobile Responsive *\/\r\n    @media (min-width: 768px) {\r\n      #dnsBulkWidget .dns-main-layout {\r\n        display: grid !important;\r\n        grid-template-columns: 1fr 320px !important;\r\n        gap: 20px !important;\r\n      }\r\n      \r\n      #dnsBulkWidget .dns-actions {\r\n        flex-direction: column !important;\r\n        align-items: stretch !important;\r\n      }\r\n      \r\n      #dnsBulkWidget .dns-action-buttons {\r\n        display: flex !important;\r\n        flex-direction: column !important;\r\n        gap: 10px !important;\r\n      }\r\n      \r\n      #dnsBulkWidget .dns-textarea {\r\n        min-height: 160px !important;\r\n      }\r\n    }\r\n    \r\n    @media (max-width: 767px) {\r\n      #dnsBulkWidget .dns-actions {\r\n        flex-direction: column !important;\r\n      }\r\n      \r\n      #dnsBulkWidget .dns-action-buttons {\r\n        width: 100% !important;\r\n      }\r\n      \r\n      #dnsBulkWidget .dns-btn {\r\n        flex: 1 !important;\r\n      }\r\n      \r\n      #dnsBulkWidget .dns-types {\r\n        justify-content: center !important;\r\n      }\r\n\r\n      #dnsBulkWidget .dns-table-header.mobile-hidden,\r\n      #dnsBulkWidget .dns-table-cell.mobile-hidden {\r\n        display: none !important;\r\n      }\r\n\r\n      #dnsBulkWidget .dns-table-header,\r\n      #dnsBulkWidget .dns-table-cell {\r\n        padding: 8px 6px !important;\r\n        font-size: 11px !important;\r\n      }\r\n    }\r\n  `;\r\n\r\n  \/\/ Th\u00eam CSS v\u00e0o head\r\n  const styleEl = document.createElement('style');\r\n  styleEl.textContent = widgetStyles;\r\n  document.head.appendChild(styleEl);\r\n\r\n  root.innerHTML = `\r\n  <div class=\"dns-container\">\r\n    \r\n    <!-- DPS.MEDIA Header -->\r\n    <div class=\"dns-header\">\r\n      <div class=\"dns-header-bg1\">\r\n      <div class=\"dns-header-bg2\">\r\n      <div class=\"dns-header-content\">\r\n        <div class=\"dns-header-top\">\r\n          <div class=\"dns-header-left\">\r\n            <div class=\"dns-icon\">\ud83d\udd0d\r\n            <div>\r\n              <div class=\"dns-title\">Tra C\u1ee9u DNS H\u00e0ng Lo\u1ea1t\r\n              <div class=\"dns-subtitle\">C\u00f4ng c\u1ee5 chuy\u00ean nghi\u1ec7p t\u1eeb DPS.MEDIA\r\n            \r\n          \r\n          <div class=\"dns-brand\">\r\n            <div class=\"dns-brand-name\">DPS.MEDIA\r\n            <div>Digital Tools\r\n          \r\n        \r\n        <div class=\"dns-desc\">Nh\u1eadp m\u1ed7i t\u00ean mi\u1ec1n m\u1ed9t d\u00f2ng (c\u00f3 th\u1ec3 d\u00e1n URL). Ch\u1ecdn lo\u1ea1i b\u1ea3n ghi ho\u1eb7c \"T\u1ea4T C\u1ea2\" \u0111\u1ec3 tra 5 lo\u1ea1i ph\u1ed5 bi\u1ebfn.\r\n      \r\n    \r\n\r\n    <!-- Main Content -->\r\n    <div class=\"dns-main\">\r\n      <!-- Mobile\/Desktop Layout -->\r\n      <div class=\"dns-main-layout\">\r\n        \r\n        <!-- Input Section -->\r\n        <div class=\"dns-input-section\">\r\n          <textarea id=\"dns-lines\" class=\"dns-textarea\" rows=\"6\" placeholder=\"dps.media\nexample.com\nhttps:\/\/sub.domain.com\/\">\r\n          <div id=\"dns-count\" class=\"dns-count\">0 t\u00ean mi\u1ec1n\r\n        \r\n        \r\n        <!-- Controls Section -->\r\n        <div class=\"dns-controls\">\r\n          \r\n          <!-- Record Types -->\r\n          <div>\r\n            <div class=\"dns-label\">Lo\u1ea1i B\u1ea3n Ghi:\r\n            <div id=\"dns-types\" class=\"dns-types\">\r\n          \r\n          \r\n          <!-- Settings & Buttons Row -->\r\n          <div class=\"dns-actions\">\r\n            \r\n            <!-- Delay Setting -->\r\n            <div class=\"dns-delay-section\">\r\n              <div class=\"dns-delay-label\">\u0110\u1ed9 tr\u1ec5 gi\u1eefa c\u00e1c request:\r\n              <div class=\"dns-delay-input-group\">\r\n                <input id=\"dns-delay\" type=\"number\" min=\"50\" step=\"10\" value=\"120\" class=\"dns-delay-input\"> \r\n                <span class=\"dns-delay-unit\">ms\r\n              \r\n            \r\n            \r\n            <!-- Action Buttons -->\r\n            <div class=\"dns-action-buttons\">\r\n              <button id=\"dns-run\" class=\"dns-btn dns-btn-primary\">\r\n                <span id=\"run-text\">\ud83d\ude80 B\u1eaft \u0110\u1ea7u\r\n              \r\n              <button id=\"dns-stop\" class=\"dns-btn dns-btn-secondary\" style=\"display:none\">\r\n                \u23f9\ufe0f D\u1eebng\r\n              \r\n            \r\n          \r\n        \r\n      \r\n\r\n      <!-- Status & Actions Bar -->\r\n      <div class=\"dns-status-bar\">\r\n        <button id=\"dns-copy-table\" class=\"dns-btn-small dns-btn-copy\" disabled>\r\n          \ud83d\udccb Sao Ch\u00e9p\r\n        \r\n        <button id=\"dns-clear\" class=\"dns-btn-small dns-btn-clear\">\r\n          \ud83d\uddd1\ufe0f X\u00f3a\r\n        \r\n        \r\n        <!-- Progress Bar -->\r\n        <div class=\"dns-status-right\">\r\n          <div id=\"dns-progress\" class=\"dns-progress\">\r\n            <div id=\"dns-progress-bar\" class=\"dns-progress-bar\">\r\n          \r\n          <div id=\"dns-status\" class=\"dns-status\">\r\n        \r\n      \r\n\r\n      <!-- Error Display -->\r\n      <div id=\"dns-error\" class=\"dns-error\">\r\n        <span class=\"dns-error-icon\">\u26a0\ufe0f\r\n        <span id=\"dns-error-text\" class=\"dns-error-text\">\r\n      \r\n\r\n      <!-- Results Table -->\r\n      <div id=\"dns-results\" class=\"dns-results\">\r\n        <div class=\"dns-empty-state\">\r\n          <div class=\"dns-empty-icon\">\ud83d\udcca\r\n          <div class=\"dns-empty-text\">S\u1eb5n s\u00e0ng tra c\u1ee9u b\u1ea3n ghi DNS...\r\n          <div class=\"dns-empty-subtext\">\u0110\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi DPS.MEDIA\r\n        \r\n      \r\n    \r\n\r\n    <!-- Footer -->\r\n    <div class=\"dns-footer\">\r\n      <div class=\"dns-footer-content\">\r\n        <span>Ph\u00e1t tri\u1ec3n b\u1edfi\r\n        <strong class=\"dns-footer-brand\">DPS.MEDIA\r\n        <span>\u2022\r\n        <span>C\u00f4ng c\u1ee5 s\u1ed1 chuy\u00ean nghi\u1ec7p\r\n        <span>\u2022\r\n        <a href=\"https:\/\/dps.media\" target=\"_blank\" class=\"dns-footer-link\">dps.media\r\n      \r\n    \r\n  `;\r\n\r\n  const ta = root.querySelector('#dns-lines');\r\n  const btnRun = root.querySelector('#dns-run');\r\n  const btnStop = root.querySelector('#dns-stop');\r\n  const btnClear = root.querySelector('#dns-clear');\r\n  const typesWrap = root.querySelector('#dns-types');\r\n  const statusEl = root.querySelector('#dns-status');\r\n  const errorEl = root.querySelector('#dns-error');\r\n  const errorTextEl = root.querySelector('#dns-error-text');\r\n  const resultsEl = root.querySelector('#dns-results');\r\n  const delayInput = root.querySelector('#dns-delay');\r\n  const btnCopy = root.querySelector('#dns-copy-table');\r\n  const countEl = root.querySelector('#dns-count');\r\n  const progressEl = root.querySelector('#dns-progress');\r\n  const progressBarEl = root.querySelector('#dns-progress-bar');\r\n  const runTextEl = root.querySelector('#run-text');\r\n\r\n  \/\/ Type pills v\u1edbi DPS branding\r\n  const TYPE_LABELS = {\r\n    'ALL': 'T\u1ea4T C\u1ea2',\r\n    'A': 'A', \r\n    'CNAME': 'CNAME',\r\n    'MX': 'MX',\r\n    'NS': 'NS',\r\n    'TXT': 'TXT'\r\n  };\r\n\r\n  let activeType = 'A';\r\n  RECORDS.forEach(t => {\r\n    const b = document.createElement('button');\r\n    b.textContent = TYPE_LABELS[t] || t;\r\n    b.className = 'dns-type-btn';\r\n    if (t === activeType) {\r\n      b.classList.add('active');\r\n    }\r\n    \r\n    b.addEventListener('click',()=>{\r\n      if (isRunning) return;\r\n      activeType = t;\r\n      [...typesWrap.children].forEach(c => c.classList.remove('active'));\r\n      b.classList.add('active');\r\n    });\r\n    typesWrap.appendChild(b);\r\n  });\r\n\r\n  \/\/ Domain count tracker v\u1edbi DPS colors\r\n  function updateDomainCount() {\r\n    const domains = ta.value.split(\/\\r?\\n\/)\r\n      .map(s=>extractHostname(s))\r\n      .filter(Boolean);\r\n    countEl.textContent = `${domains.length} t\u00ean mi\u1ec1n`;\r\n    \r\n    if (domains.length > 100) {\r\n      countEl.style.background = 'rgba(220,38,38,0.9) !important';\r\n      countEl.style.color = 'white !important';\r\n    } else if (domains.length > 50) {\r\n      countEl.style.background = 'rgba(245,158,11,0.9) !important';\r\n      countEl.style.color = 'white !important';\r\n    } else if (domains.length > 0) {\r\n      countEl.style.background = 'rgba(50,181,97,0.9) !important';\r\n      countEl.style.color = 'white !important';\r\n    } else {\r\n      countEl.style.background = 'rgba(21,21,119,0.9) !important';\r\n      countEl.style.color = 'white !important';\r\n    }\r\n  }\r\n\r\n  ta.addEventListener('input', updateDomainCount);\r\n  updateDomainCount();\r\n\r\n  function clampDelay(){\r\n    let v = Number(delayInput.value || 0);\r\n    if (!Number.isFinite(v) || v < 50){\r\n      v = 50;\r\n      delayInput.value = String(v);\r\n      setStatus('\u26a0\ufe0f \u0110\u1ed9 tr\u1ec5 \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ed1i thi\u1ec3u: 50ms');\r\n    }\r\n    return v;\r\n  }\r\n  delayInput.addEventListener('input', clampDelay);\r\n  delayInput.addEventListener('blur', clampDelay);\r\n  delayInput.addEventListener('keydown', (e)=>{\r\n    if (e.key === '-') e.preventDefault();\r\n  });\r\n\r\n  function extractHostname(input){\r\n    if(!input) return '';\r\n    try{ return new URL(input).hostname.replace(\/\\.$\/,''); }\r\n    catch(e){ return String(input).trim().replace(\/^https?:\\\/\\\/\/i,'').replace(\/^\\\/*\/,'').split('\/')[0].split('?')[0].replace(\/\\.$\/,''); }\r\n  }\r\n\r\n  function sleep(ms){ return new Promise(r=>setTimeout(r, ms)); }\r\n\r\n  function clearError(){ \r\n    errorEl.style.display='none'; \r\n    errorTextEl.textContent=''; \r\n  }\r\n  function showError(msg){ \r\n    errorEl.style.display='flex'; \r\n    errorTextEl.textContent=msg; \r\n  }\r\n  function setStatus(msg){ \r\n    statusEl.textContent = msg; \r\n  }\r\n\r\n  function updateProgress(current, total) {\r\n    if (total === 0) {\r\n      progressEl.style.display = 'none';\r\n      return;\r\n    }\r\n    progressEl.style.display = 'block';\r\n    const percentage = Math.min((current \/ total) * 100, 100);\r\n    progressBarEl.style.width = `${percentage}%`;\r\n  }\r\n\r\n  \/\/ Render table v\u1edbi DPS branding - S\u1eed d\u1ee5ng div thay v\u00ec table elements\r\n  function ensureTable(){\r\n    if(resultsEl.firstChild && resultsEl.firstChild.classList && resultsEl.firstChild.classList.contains('dns-table')) return resultsEl.firstChild;\r\n    resultsEl.innerHTML = '';\r\n    const table = document.createElement('div');\r\n    table.className = 'dns-table';\r\n    \r\n    const isMobile = window.innerWidth < 768;\r\n    table.innerHTML = `<div class=\"dns-table-header-row\">\r\n      <div class=\"dns-table-header\">T\u00ean Mi\u1ec1n\r\n      <div class=\"dns-table-header center\">Lo\u1ea1i\r\n      <div class=\"dns-table-header ${isMobile ? 'mobile-hidden' : ''}\">T\u00ean\r\n      <div class=\"dns-table-header center\">TTL\r\n      <div class=\"dns-table-header\">D\u1eef Li\u1ec7u\r\n    <div class=\"dns-table-body\">`;\r\n    resultsEl.appendChild(table);\r\n    return table;\r\n  }\r\n\r\n  const allRows = [];\r\n  function appendRows(rows){\r\n    const table = ensureTable();\r\n    const tbody = table.querySelector('.dns-table-body');\r\n    const frag = document.createDocumentFragment();\r\n    const isMobile = window.innerWidth < 768;\r\n    \r\n    rows.forEach((r, i) => {\r\n      allRows.push(r);\r\n      const tr = document.createElement('div');\r\n      tr.className = 'dns-table-row';\r\n      \r\n      let dataColor = '#374151';\r\n      if (r.data === '(kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u)') dataColor = '#9ca3af';\r\n      else if (r.data && r.data.startsWith('L\u1ed7i:')) dataColor = '#dc2626';\r\n      \r\n      tr.innerHTML = `<div class=\"dns-table-cell\">${r.domain}\r\n        <div class=\"dns-table-cell center type\">${r.type}\r\n        <div class=\"dns-table-cell name ${isMobile ? 'mobile-hidden' : ''}\">${r.name||''}\r\n        <div class=\"dns-table-cell center ttl\">${r.ttl??''}\r\n        <div class=\"dns-table-cell data\" style=\"color:${dataColor}\">${r.data||''}`;\r\n      frag.appendChild(tr);\r\n    });\r\n    tbody.appendChild(frag);\r\n    \r\n    btnCopy.disabled = false;\r\n    btnCopy.classList.remove('success');\r\n  }\r\n\r\n  async function queryDoH(domain, type){\r\n    const base = 'https:\/\/dns.google\/resolve';\r\n    const params = new URLSearchParams();\r\n    params.set('name', domain);\r\n    params.set('type', TYPE_CODE[type]);\r\n    const url = `${base}?${params.toString()}`;\r\n    const res = await fetch(url, { headers: { 'Accept':'application\/json' }});\r\n    if(!res.ok) throw new Error(`HTTP ${res.status}`);\r\n    return await res.json();\r\n  }\r\n\r\n  let abortFlag = false;\r\n  let isRunning = false;\r\n\r\n  btnStop.addEventListener('click', ()=>{ \r\n    abortFlag = true; \r\n    setStatus('\ud83d\uded1 \u0110ang d\u1eebng...'); \r\n  });\r\n\r\n  btnClear.addEventListener('click', () => {\r\n    if (isRunning) return;\r\n    resultsEl.innerHTML = `<div class=\"dns-empty-state\">\r\n      <div class=\"dns-empty-icon\">\ud83d\udcca\r\n      <div class=\"dns-empty-text\">S\u1eb5n s\u00e0ng tra c\u1ee9u b\u1ea3n ghi DNS...\r\n      <div class=\"dns-empty-subtext\">\u0110\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi DPS.MEDIA\r\n    `;\r\n    allRows.length = 0;\r\n    btnCopy.disabled = true;\r\n    btnCopy.classList.remove('success');\r\n    clearError();\r\n    setStatus('');\r\n    progressEl.style.display = 'none';\r\n  });\r\n\r\n  btnRun.addEventListener('click', async ()=>{\r\n    if (isRunning) return;\r\n    \r\n    clearError(); \r\n    allRows.length = 0; \r\n    abortFlag = false;\r\n    isRunning = true;\r\n\r\n    btnRun.disabled = true;\r\n    runTextEl.textContent = '\u23f3 \u0110ang ch\u1ea1y...';\r\n    btnStop.style.display = 'block';\r\n    btnClear.style.display = 'none';\r\n    \r\n    [...typesWrap.children].forEach(b => {\r\n      b.style.cursor = 'not-allowed';\r\n      b.style.opacity = '0.6';\r\n    });\r\n\r\n    const delay = clampDelay();\r\n\r\n    const domains = ta.value.split(\/\\r?\\n\/)\r\n      .map(s=>extractHostname(s))\r\n      .filter(Boolean);\r\n\r\n    if (!domains.length){ \r\n      showError('Vui l\u00f2ng nh\u1eadp \u00edt nh\u1ea5t 1 t\u00ean mi\u1ec1n.'); \r\n      resetUIState();\r\n      return; \r\n    }\r\n    if (domains.length > 100){ \r\n      showError('Gi\u1edbi h\u1ea1n 100 t\u00ean mi\u1ec1n m\u1ed7i l\u1ea7n \u0111\u1ec3 tr\u00e1nh qu\u00e1 t\u1ea3i. H\u00e3y chia nh\u1ecf danh s\u00e1ch.'); \r\n      resetUIState();\r\n      return; \r\n    }\r\n\r\n    const types = (activeType==='ALL') ? [...POPULAR] : [activeType];\r\n    const totalQueries = domains.length * types.length;\r\n\r\n    resultsEl.innerHTML = '';\r\n    ensureTable();\r\n\r\n    let completed = 0;\r\n    for (let i=0; i<domains.length && !abortFlag; i++){\r\n      const d = domains[i];\r\n      for (const t of types){\r\n        if (abortFlag) break;\r\n        try{\r\n          setStatus(`\ud83d\udd0d ${d} [${t}] (${completed + 1}\/${totalQueries})`);\r\n          updateProgress(completed, totalQueries);\r\n          \r\n          const json = await queryDoH(d, t);\r\n          if (json && Array.isArray(json.Answer) && json.Answer.length > 0){\r\n            const rows = json.Answer.map(a=>({ domain:d, type:t, name:a.name, ttl:a.TTL, data:a.data }));\r\n            appendRows(rows);\r\n          } else if (json && Array.isArray(json.Authority) && json.Authority.length > 0){\r\n            const rows = json.Authority.map(a=>({ domain:d, type:t, name:a.name, ttl:a.TTL, data:a.data }));\r\n            appendRows(rows);\r\n          } else {\r\n            appendRows([{ domain:d, type:t, name:'', ttl:'', data:'(kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u)' }]);\r\n          }\r\n        }catch(e){\r\n          appendRows([{ domain:d, type:t, name:'', ttl:'', data:`L\u1ed7i: ${e.message}` }]);\r\n        }\r\n        completed++;\r\n        updateProgress(completed, totalQueries);\r\n        if (completed < totalQueries && !abortFlag) {\r\n          await sleep(delay);\r\n        }\r\n      }\r\n    }\r\n    \r\n    if (abortFlag) {\r\n      setStatus(`\u23f9\ufe0f \u0110\u00e3 d\u1eebng (${completed}\/${totalQueries})`);\r\n    } else {\r\n      setStatus(`\u2705 Ho\u00e0n th\u00e0nh! ${allRows.length} b\u1ea3n ghi t\u1eeb ${domains.length} t\u00ean mi\u1ec1n`);\r\n    }\r\n    \r\n    resetUIState();\r\n  });\r\n\r\n  function resetUIState() {\r\n    isRunning = false;\r\n    btnRun.disabled = false;\r\n    runTextEl.textContent = '\ud83d\ude80 B\u1eaft \u0110\u1ea7u';\r\n    btnStop.style.display = 'none';\r\n    btnClear.style.display = 'block';\r\n    progressEl.style.display = 'none';\r\n    \r\n    [...typesWrap.children].forEach(b => {\r\n      b.style.cursor = 'pointer';\r\n      b.style.opacity = '1';\r\n    });\r\n  }\r\n\r\n  function escapeCell(v){\r\n    if (v == null) return '';\r\n    const s = String(v);\r\n    return s.replace(\/\\t\/g, ' ').replace(\/\\r?\\n\/g, ' ');\r\n  }\r\n  function rowsToTSV(rows){\r\n    const header = ['T\u00ean Mi\u1ec1n','Lo\u1ea1i','T\u00ean','TTL','D\u1eef Li\u1ec7u'];\r\n    const lines = [header.join('\\t')].concat(rows.map(r => [r.domain, r.type, r.name||'', r.ttl??'', r.data||''].map(escapeCell).join('\\t')));\r\n    return lines.join('\\n');\r\n  }\r\n  async function copyText(text){\r\n    if (navigator.clipboard && navigator.clipboard.writeText){\r\n      await navigator.clipboard.writeText(text);\r\n    } else {\r\n      const ta = document.createElement('textarea');\r\n      ta.value = text; document.body.appendChild(ta); ta.select(); document.execCommand('copy'); document.body.removeChild(ta);\r\n    }\r\n  }\r\n  btnCopy.addEventListener('click', async ()=>{\r\n    if (!allRows.length){ setStatus('\u274c Kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u \u0111\u1ec3 sao ch\u00e9p.'); return; }\r\n    try{\r\n      await copyText(rowsToTSV(allRows));\r\n      setStatus('\u2705 \u0110\u00e3 sao ch\u00e9p b\u1ea3ng v\u00e0o clipboard!');\r\n      \r\n      const originalText = btnCopy.textContent;\r\n      btnCopy.textContent = '\u2705 \u0110\u00e3 sao ch\u00e9p!';\r\n      btnCopy.classList.add('success');\r\n      \r\n      setTimeout(() => {\r\n        btnCopy.textContent = originalText;\r\n        btnCopy.classList.remove('success');\r\n      }, 2000);\r\n    }catch(e){ \r\n      setStatus('\u274c Sao ch\u00e9p th\u1ea5t b\u1ea1i: ' + e.message); \r\n    }\r\n  });\r\n\r\n  \/\/ Window resize handler\r\n  let resizeTimeout;\r\n  window.addEventListener('resize', () => {\r\n    clearTimeout(resizeTimeout);\r\n    resizeTimeout = setTimeout(() => {\r\n      if (resultsEl.firstChild && resultsEl.firstChild.classList && resultsEl.firstChild.classList.contains('dns-table')) {\r\n        const currentRows = [...allRows];\r\n        allRows.length = 0;\r\n        resultsEl.innerHTML = '';\r\n        if (currentRows.length > 0) {\r\n          appendRows(currentRows);\r\n        }\r\n      }\r\n    }, 100);\r\n  });\r\n\r\n  \/\/ Initialize copy button state\r\n  btnCopy.disabled = true;\r\n})();\r\n<\/script><!-- End DNS Bulk Lookup Widget - DPS.MEDIA --><strong>Check t\u00ean mi\u1ec1n & ki\u1ec3m tra \u200bt\u00ean mi\u1ec1n \u200bwebsite mi\u1ec5n ph\u00ed l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u2064quy\u1ebft \u0111\u1ecbnh th\u00e0nh c\u00f4ng c\u1ee7a th\u01b0\u01a1ng hi\u1ec7u online.<\/strong><p> A suitable domain name helps increase recognition and build credibility in the digital market.<\/p><p>According to surveys, over 70% of customers trust websites with clear, easy-to-remember domain names. DPS.MEDIA always emphasizes choosing the right domain to support SMEs in sustainable development.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/-check.jpg\" alt=\"The importance of checking a domain name before registration\" title=\"\"><\/p><h2 id=\"tam-quan-trong-cua-viec-kiem-tra-ten-mien-truoc-khi-dang-ky\">The importance of checking the domain name before registration<\/h2><h3>Minimize legal risks and brand loss<\/h3><p>Before registering, checking the domain name helps you avoid duplication with brands that have already registered copyrights. This helps protect <strong>intellectual property<\/strong> and avoid unnecessary litigation.<\/p><p>\u2013 M\u1ed9t\u200d c\u00f4ng ty nh\u1ecf t\u1ea1i\u2064 H\u00e0 N\u1ed9i t\u1eebng \u2062bu\u1ed9c \u0111\u1ed5i \u200dt\u00ean web \u2063sau 3 th\u00e1ng do vi \u200dph\u1ea1m \u2063t\u00ean mi\u1ec1n tr\u00f9ng v\u1edbi \u200bnh\u00e3n hi\u1ec7u \u0111\u00e3 \u0111\u0103ng k\u00fd.<br>\n\u2013 Theo b\u00e1o c\u00e1o \u200cc\u1ee7a\u2064 WIPO (2022), h\u01a1n 5.600\u200c v\u1ee5\u200c tranh ch\u1ea5p t\u00ean mi\u1ec1n \u200b\u0111\u00e3 x\u1ea3y\u2062 ra to\u00e0n c\u1ea7u trong n\u0103m qua.<\/p><div class=\"wp-block-group has-background\" style=\"background:#f0f0f0;padding:10px\">\n  <strong>\ud83d\udca1 Tip:<\/strong> Always check the trademark status at the Intellectual Property Office before registering a domain name.\n<\/div><h3>Limit SEO risks and website credibility<\/h3><p>A domain name that was previously penalized or used for malicious purposes (spam, phishing) can negatively affect search rankings.<\/p><p>\u2013 Google c\u00f3 kh\u1ea3 n\u0103ng gi\u1eef l\u1ea1i \u201cd\u1ea5u\u200b v\u1ebft\u201d\u2063 ti\u00eau c\u1ef1c c\u1ee7a domain c\u0169.<br>\n\u2013 C\u00e1c c\u00f4ng c\u1ee5 \u2062nh\u01b0 Wayback Machine \u2064ho\u1eb7c Ahrefs h\u1ed7 tr\u1ee3 tra c\u1ee9u l\u1ecbch \u2064s\u1eed t\u00ean\u2064 mi\u1ec1n mi\u1ec5n \u2064ph\u00ed.<\/p><p><b>Safe domain name checklist:<\/b><\/p><ul>\n<li>\u2705 Check if the domain name is still available<\/li>\n<li>\u2705 Review activity history via archive.org<\/li>\n<li>\u2705 Check blacklist from MXToolbox or Google Transparency Report<\/li>\n<li>\u2705 Evaluate spam score from Moz or SEMrush<\/li>\n<\/ul><h3>Impact on long-term brand strategy<\/h3><p>A domain name is part of your branding strategy. Choosing the wrong or duplicate one can cause your business to lose direction in the long term.<\/p><p>\u2013 M\u1ed9t startup c\u00f4ng ngh\u1ec7 \u2062t\u1ea1i \u0110\u00e0 N\u1eb5ng \u0111\u00e3 ph\u1ea3i chi \u2062h\u01a1n 3.000 USD\u2063 \u0111\u1ec3 mua l\u1ea1i \u200bt\u00ean mi\u1ec1n do b\u1ecf qua b\u01b0\u1edbc check ban \u0111\u1ea7u.<br>\n\u2013 Theo ICANN Report (2023), h\u01a1n 24% doanh nghi\u1ec7p\u2064 kh\u1edfi nghi\u1ec7p bu\u1ed9c\u2063 thay \u0111\u1ed5i t\u00ean mi\u1ec1n n\u0103m \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng.<\/p><table class=\"WordPress\">\n<thead>\n<tr>\n<th>Criteria<\/th>\n<th>Need to check<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Brand copyright<\/td>\n<td>Which brand does the domain name duplicate?<\/td>\n<\/tr>\n<tr>\n<td>Spam history<\/td>\n<td>Has it been blacklisted by Google?<\/td>\n<\/tr>\n<tr>\n<td>Available<\/td>\n<td>Has it been registered?<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Brief summary:<\/h3><p><strong>Don't register a domain name without thoroughly checking first!<\/strong> M\u1ed9t v\u00e0i ph\u00fat check t\u00ean mi\u1ec1n c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m h\u00e0ng\u200c th\u00e1ng\u2064 \u2013 th\u1eadm ch\u00ed h\u00e0ng n\u0103m\u200b \u2013 th\u1eddi \u2064gian v\u00e0 chi ph\u00ed ch\u1ec9nh s\u1eeda th\u01b0\u01a1ng hi\u1ec7u, tr\u00e1nh\u200c nh\u1eefng r\u1ee7i ro kh\u00f4ng \u0111\u00e1ng c\u00f3 \u200bv\u00e0 x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng web an \u2064to\u00e0n t\u1eeb \u0111\u1ea7u.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/-la-gi.jpg0493.jpg\" alt=\"Effective free domain checking methods for SMEs\" title=\"\"><\/p><h2 id=\"phuong-phap-kiem-tra-ten-mien-mien-phi-hieu-qua-cho-doanh-nghiep-smes\">Effective free domain checking methods for SMEs<\/h2><h3>1. Popular free domain checking tools<\/h3><p>To get started, you don't need to invest any money, just take advantage of the following online tools:<\/p><ul>\n<li><strong>Whois Lookup (ICANN \/ DomainTools):<\/strong> X\u00e1c th\u1ef1c \u2063ch\u1ee7 \u2063s\u1edf h\u1eefu & ng\u00e0y h\u1ebft h\u1ea1n.<\/li>\n<li><strong>Name.com \/ GoDaddy \/ Porkbun:<\/strong> Check availability and domain name suggestions.<\/li>\n<li><strong>Google Domains Insights:<\/strong> Analyze domain search trends by industry (Google, 2023).<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n<p><strong>Tip:<\/strong> H\u00e3y ki\u1ec3m \u200btra tr\u00ean\u2064 2-3\u2064 c\u00f4ng c\u1ee5 \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn tr\u1ea1ng th\u00e1i \u201ct\u00ean mi\u1ec1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd\u201d\u200c ho\u1eb7c \u201cs\u1eafp h\u1ebft\u2064 h\u1ea1n\u201d.<\/p>\n<\/div><h3>2. Pre-selection domain name checklist<\/h3><p>Before deciding to buy a domain, make sure you have reviewed the following factors:<\/p><ul>\n<li>\u2705 The domain contains the main keyword of the industry\/field<\/li>\n<li>\u2705 Not identical\/similar to a registered brand (check with the Intellectual Property Office)<\/li>\n<li>\u2705 Suitable domain extension (prioritize *.com, .vn or .com.vn for SMEs in Vietnam)<\/li>\n<li>\u2705 \u0110\u01b0\u1ee3c \u0111\u0103ng\u2064 k\u00fd s\u1edbm nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ec3 tr\u00e1nh b\u1ecb\u200c \u201cc\u01b0\u1edbp \u200cm\u1ea5t\u201d (trung \u200db\u00ecnh, \u2063m\u1ed7i ph\u00fat c\u00f3 5 domain \u0111\u01b0\u1ee3c \u0111\u0103ng\u2063 k\u00fd \u2064m\u1edbi\u200c -\u200c Verisign, 2022)<\/li>\n<\/ul><h3>3. Comparison table of domain check tools<\/h3><table class=\"wordpress\">\n<thead>\n<tr>\n<th>Tool<\/th>\n<th>Free<\/th>\n<th>Outstanding features<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ICANN Whois<\/td>\n<td>Yes<\/td>\n<td>Official ownership information lookup<\/td>\n<\/tr>\n<tr>\n<td>Namecheap<\/td>\n<td>Yes<\/td>\n<td>Ki\u1ec3m tra, so s\u00e1nh & g\u1ee3i \u00fd t\u00ean \u2063mi\u1ec1n m\u1edf r\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td>DPS.MEDIA tool<\/td>\n<td>Yes<\/td>\n<td>T\u00edch h\u1ee3p ki\u1ec3m tra & \u2064b\u00e1o gi\u00e1 nhi\u1ec1u \u0111u\u00f4i \u200cdomain<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>4. Real-life example from a small business<\/h3><p>M\u1ed9t startup d\u1ecbch \u2064v\u1ee5 logistics t\u1ea1i B\u00ecnh D\u01b0\u01a1ng\u2063 b\u1ecb m\u1ea5t t\u00ean mi\u1ec1n ban \u0111\u1ea7u ch\u1ec9 \u200b24h sau khi\u200c t\u00ecm ki\u1ebfm b\u1eb1ng c\u00f4ng c\u1ee5 mi\u1ec5n\u200c ph\u00ed nh\u01b0ng kh\u00f4ng \u0111\u0103ng k\u00fd ngay. H\u1ecd \u2063bu\u1ed9c ph\u1ea3i\u2064 th\u01b0\u01a1ng l\u01b0\u1ee3ng mua l\u1ea1i v\u1edbi gi\u00e1 g\u1ea5p 10 l\u1ea7n \u2013 t\u1eeb \u2063250.000\u0111 \u2062l\u00ean 2.500.000\u0111 (ngu\u1ed3n: kh\u1ea3o s\u00e1t <a class=\"wpil_keyword_link\" href=\"https:\/\/dps.media\/en\/\" title=\"DPS.MEDIA JSC\" data-wpil-keyword-link=\"linked\" data-wpil-monitor-id=\"763\">DPS.MEDIA<\/a> \u0111\u1ed1i t\u00e1c n\u1ed9i b\u1ed9, 2023).<\/p><div class=\"wp-block-group has-background\">\n<p><strong>Tip:<\/strong> Always enable service <em>domain locking<\/em> (domain lock) if you are not developing your website immediately, to avoid unwanted transfers.<\/p>\n<\/div><h3>5. Potential risks and challenges<\/h3><ul>\n<li>\u26a0\ufe0f Not checking carefully can easily lead to trademark infringement.<\/li>\n<li>\u26a0\ufe0f D\u1eef \u2064li\u1ec7u Whois c\u00f3 th\u1ec3 b\u1ecb \u1ea9n \u2013 \u2062c\u1ea7n k\u1ebft h\u1ee3p nhi\u1ec1u ngu\u1ed3n x\u00e1c minh.<\/li>\n<li>\u26a0\ufe0f M\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 mi\u1ec5n ph\u00ed\u2062 c\u00f3 th\u1ec3\u2062 l\u01b0u log & b\u00e1n l\u1ea1i \u200cth\u00f4ng\u2064 tin truy v\u1ea5n.<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n<p><strong>Note:<\/strong> Use incognito mode on your browser for the first lookup to limit data leakage.<\/p>\n<\/div><h3>Takeaway<\/h3><p>Vi\u1ec7c \u2062ki\u1ec3m tra t\u00ean mi\u1ec1n l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u \u2062quan\u200c tr\u1ecdng \u0111\u1ec3\u2063 b\u1ea3o v\u1ec7 th\u01b0\u01a1ng hi\u1ec7u\u200d online cho SMEs.\u2062 H\u00e3y ch\u1ee7 \u0111\u1ed9ng, ki\u1ec3m tra \u0111a ngu\u1ed3n\u200b v\u00e0\u200b \u0111\u0103ng\u2063 k\u00fd c\u00e0ng s\u1edbm c\u00e0ng t\u1ed1t \u2013 \u0111\u1ec3 m\u1ed7i \u2064t\u00ean\u200b mi\u1ec1n l\u00e0 m\u1ed9t t\u00e0i s\u1ea3n l\u00e2u d\u00e0i, kh\u00f4ng b\u1ecb \u0111\u00e1nh m\u1ea5t ch\u1ec9 v\u00ec ch\u1eadm m\u1ed9t b\u01b0\u1edbc.<\/p><p>\u2013 DPS.MEDIA \u200dJSC\u200c -\u200b Digital Marketing Solutions cho SMEs.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/00x500.jpg\" alt=\"How to evaluate and choose a domain name suitable for your brand strategy\" title=\"\"><\/p><h2 id=\"cach-danh-gia-va-lua-chon-ten-mien-phu-hop-voi-chien-luoc-thuong-hieu\">How to evaluate and choose a domain name suitable for brand strategy<\/h2><h3>Criteria for effective domain name selection<\/h3><p>When evaluating a domain name, ensure the following factors to increase brand recognition and support SEO strategy:<\/p><ul>\n<li><strong>Short, easy to remember:<\/strong> A good domain name is usually under 15 characters.<\/li>\n<li><strong>Easy to read, easy to type:<\/strong> Avoid underscores, numbers, and special characters.<\/li>\n<li><strong>Relevant to the business field:<\/strong> Reminds of the service\/product being offered.<\/li>\n<li><strong>Use the appropriate domain extension:<\/strong> .com, .vn, or .com.vn depending on your target market.<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n  <strong>Tip:<\/strong> If your brand name is unique (like Zalora or Foody), you should prioritize securing both .com and .vn to avoid being copied.\n<\/div><h3>Check availability and competitiveness<\/h3><p>Before registering, use a <strong>free domain name checking tool<\/strong> to ensure:<\/p><ul>\n<li>The domain has not been registered or put up for auction.<\/li>\n<li>It does not duplicate an existing copyrighted brand.<\/li>\n<li>It is not listed in databases with a bad history (SPAM, malware).<\/li>\n<\/ul><p>A real-life example: A Vietnamese furniture business once chose the domain noithatcaocap.vn but realized that 5 competitors had already created similar subdomains. As a result, their natural Google click-through rate (CTR) dropped by 22% (source: Vietnam Digital Tech Report 2022).<\/p><h3>Brand domain name selection checklist<\/h3><ul>\n<li>[ ]    Legal and duplication check completed<\/li>\n<li>[ ]    Memorability tested via internal survey<\/li>\n<li>[ ]    Brand scalability possible in the next 3-5 years<\/li>\n<li>[ ]    Does not violate Google Ads and Facebook Ads policies<\/li>\n<\/ul><h3>Quick comparison table of popular domain extensions<\/h3><table class=\"wordpress\">\n<thead>\n<tr>\n<th>Domain extension<\/th>\n<th>Advantages<\/th>\n<th>For the platform<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>.com<\/td>\n<td>Popular, memorable, professional<\/td>\n<td>Global<\/td>\n<\/tr>\n<tr>\n<td>.vn<\/td>\n<td>SEO prioritized in Vietnam<\/td>\n<td>Domestic customers<\/td>\n<\/tr>\n<tr>\n<td>.com.vn<\/td>\n<td>Flexible, combining global and local advantages<\/td>\n<td>SMEs & startups Vi\u1ec7t<\/td>\n<\/tr>\n<\/tbody>\n<\/table><div class=\"wp-block-group has-background\">\n  <strong>Note:<\/strong> Domain registration should be accompanied by brand protection through the Intellectual Property Office to avoid future legal disputes.<\/div><h3>Takeaway:<\/h3><p>M\u1ed9t t\u00ean mi\u1ec1n\u2063 t\u1ed1t kh\u00f4ng ch\u1ec9 gi\u00fap \u200cnh\u1eadn\u200c di\u1ec7n th\u01b0\u01a1ng hi\u1ec7u r\u00f5 r\u00e0ng m\u00e0 c\u00f2n h\u1ed7 tr\u1ee3 \u2062t\u0103ng\u200c hi\u1ec7u \u200bqu\u1ea3 qu\u1ea3ng b\u00e1 d\u00e0i h\u1ea1n. \u0110\u1eebng ch\u1ec9 nh\u00ecn \u0111\u1eb9p \u2013 h\u00e3y \u200cnh\u00ecn chi\u1ebfn l\u01b0\u1ee3c.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/amhaus.jpg\" alt=\"Reputable and easy-to-use domain checking tools on the market\" title=\"\"><\/p><h2 id=\"nhung-cong-cu-kiem-tra-ten-mien-uy-tin-va-de-su-dung-tren-thi-truong\">Reputable and easy-to-use domain checking tools on the market<\/h2><h3>Top popular domain checking tools today<\/h3><p>Below is a list of widely used domain checking tools with user-friendly interfaces and high accuracy:<\/p><ul>\n<li><strong>Whois Lookup (ICANN)<\/strong>: Check domain owner information directly from the international domain management organization.<\/li>\n<li><strong>Namecheap Domain Checker<\/strong>: Allows you to look up expiration date, security status, and repurchase the domain if available.<\/li>\n<li><strong>DomainTools<\/strong>: Analyze domain history, related IP addresses, and reputation ranking over time.<\/li>\n<li><strong>DPS.MEDIA Check Tool<\/strong>: Supports quick bulk domain search by keyword and suggests available domain names.<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n<p><strong>\ud83d\udca1 TIP:<\/strong> Prioritize using tools that allow viewing domain history to avoid buying domains previously penalized for SEO.<\/p>\n<\/div><h3>Real-life example: Avoiding risks when registering a used domain name<\/h3><p>An SME customer in Ho Chi Minh City once bought a cheap domain from the secondary market. However, after checking with DomainTools, they discovered the domain had been flagged as spam in 2021 (source: DomainTools Report, 2022). This reduced SEO effectiveness and increased advertising costs by 1.7 times compared to a new domain.<\/p><h3>Domain name pre-purchase checklist<\/h3><ul>\n<li>\u2705 Is the domain still available?<\/li>\n<li>\u2705 Not blacklisted or flagged as spam?<\/li>\n<li>\u2705 not related to a registered trademark?<\/li>\n<li>\u2705 \u2063C\u00f3 l\u1ecbch s\u1eed s\u1eed\u200c d\u1ee5ng\u200b t\u1ed1t (PAS \u2013 \u200dPage Authority score\u200d \u2265 30)?<\/li>\n<li>\u2705 Supports official registration through a reputable provider?<\/li>\n<\/ul><h3>Quick comparison table of tools (HTML Table)<\/h3><table class=\"wordpress\">\n<thead>\n<tr>\n<th>Tool<\/th>\n<th>Main features<\/th>\n<th>Ease of use<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ICANN Whois<\/td>\n<td>Ownership information<\/td>\n<td>\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr>\n<td>Namecheap<\/td>\n<td>Check and buy domain name<\/td>\n<td>\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr>\n<td>DomainTools<\/td>\n<td>History and risks<\/td>\n<td>\u2605\u2605\u2605\u2606\u2606<\/td>\n<\/tr>\n<tr>\n<td>DPS.MEDIA Tool<\/td>\n<td>T\u00ecm ki\u1ebfm s\u00e1ng\u200b t\u1ea1o & g\u1ee3i\u2062 \u00fd<\/td>\n<td>\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Takeaway<\/h3><p>Using the domain check tool is the first step, but extremely important to ensure long-term credibility and effectiveness for your website. A thorough check today can save millions in correction costs later.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/00x500.jpg6d4d.jpg\" alt=\"Analysis of risks when not thoroughly checking a domain before purchase\" title=\"\"><\/p><h2 id=\"phan-tich-cac-rui-ro-khi-khong-kiem-tra-ky-ten-mien-truoc-khi-mua\">analyze the risks of not thoroughly checking the domain name before purchasing<\/h2><h3>Domain previously penalized or marked as spam<\/h3><p>\u2013 M\u1ed9t \u2064t\u00ean mi\u1ec1n \u0111\u00e3 b\u1ecb google ph\u1ea1t tr\u01b0\u1edbc \u0111\u00e2y \u200bdo\u2063 ch\u1ee9a n\u1ed9i dung vi ph\u1ea1m SEO c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng x\u1ea5u\u2064 \u0111\u1ebfn th\u1ee9 h\u1ea1ng website m\u1edbi.<br>\n\u2013 C\u00e1c ch\u1ec9 s\u1ed1 nh\u01b0 <strong>Domain Authority (DA)<\/strong> or <strong>Spam score<\/strong> may be low or flagged.<br>\n\u2013 Theo Ahrefs (2023), h\u01a1n 60%\u2063 t\u00ean \u200cmi\u1ec1n h\u1ebft h\u1ea1n c\u00f3 backlink\u200c t\u1eeb c\u00e1c trang \u0111\u1ed9c h\u1ea1i.<\/p><div class=\"wp-block-group has-background\">\n<p><strong>TIP:<\/strong> Before purchasing, check the domain history with Wayback Machine (archive.org) and analyze backlinks with Ahrefs, SEMrush, or Moz.<\/p>\n<\/div><h3>Legal and brand risks<\/h3><p>\u2013 T\u00ean mi\u1ec1n \u2062c\u00f3 th\u1ec3 li\u00ean quan\u2062 \u0111\u1ebfn \u200dnh\u00e3n hi\u1ec7u \u200d\u0111\u00e3\u200d \u0111\u0103ng k\u00fd, d\u1eabn \u0111\u1ebfn nguy\u200d c\u01a1 ki\u1ec7n t\u1ee5ng.<br>\n\u2013 M\u1ed9t s\u1ed1\u2064 tr\u01b0\u1eddng h\u1ee3p t\u00ean\u2064 mi\u1ec1n ch\u1ee9a t\u1eeb \u2064kh\u00f3a tr\u00f9ng t\u00ean \u2064th\u01b0\u01a1ng hi\u1ec7u l\u1edbn, \u2062nh\u01b0 \u201cadidasvn.com\u201d, \u0111\u00e3 b\u1ecb thu h\u1ed3i \u2064v\u00ec x\u00e2m ph\u1ea1m \u2063quy\u1ec1n s\u1edf h\u1eefu tr\u00ed tu\u1ec7.- Theo WIPO\u2062 (T\u1ed5 ch\u1ee9c S\u1edf h\u1eefu Tr\u00ed\u200d tu\u1ec7 Th\u1ebf\u200b gi\u1edbi), \u200b5.616 tranh ch\u1ea5p t\u00ean \u2064mi\u1ec1n x\u1ea3y ra n\u0103m 2022 \u2013 t\u0103ng 11% so v\u1edbi n\u0103m tr\u01b0\u1edbc.<\/p><h3>Impact on reputation and marketing<\/h3><p>\u2013 N\u1ebfu\u2064 t\u00ean mi\u1ec1n tr\u01b0\u1edbc \u0111\u00e2y t\u1eebng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho n\u1ed9i dung ng\u01b0\u1eddi l\u1edbn, c\u1edd b\u1ea1c ho\u1eb7c l\u1eeba \u0111\u1ea3o, ng\u01b0\u1eddi d\u00f9ng c\u00f3\u200c th\u1ec3 m\u1ea5t ni\u1ec1m tin\u200d v\u00e0o th\u01b0\u01a1ng \u2062hi\u1ec7u\u2064 m\u1edbi.<br>\n\u2013 C\u1ea3nh b\u00e1o: C\u00e1c c\u00f4ng c\u1ee5 \u2063qu\u1ea3ng c\u00e1o nh\u01b0 Google Ads c\u00f3 th\u1ec3 t\u1eeb ch\u1ed1i t\u00ean mi\u1ec1n\u2064 c\u00f3 ti\u1ec1n s\u1eed vi ph\u1ea1m.<br>\n\u2013 M\u1ed9t doanh nghi\u1ec7p t\u1ea1i HCM t\u1eebng m\u1ea5t h\u01a1n 3 th\u00e1ng m\u1edbi\u200c kh\u00f4i ph\u1ee5c \u0111\u01b0\u1ee3c quy\u1ec1n ch\u1ea1y qu\u1ea3ng c\u00e1o v\u00ec ch\u1ecdn\u2062 ph\u1ea3i t\u00ean mi\u1ec1n t\u1eebng b\u1ecb ch\u1eb7n.<\/p><h3>Checklist: 5 steps to check a safe domain name<\/h3><ul>\n<li>\u2714\ufe0f Lookup content history at archive.org<\/li>\n<li>\u2714\ufe0f Check backlinks with Ahrefs \/ SEMrush<\/li>\n<li>\u2714\ufe0f Measure Spam score via Moz<\/li>\n<li>\u2714\ufe0f Legal trademark search at ipo.gov.vn<\/li>\n<li>\u2714\ufe0f Check on Google Safe Browsing<\/li>\n<\/ul><h3>Summary table of common risks<\/h3><table class=\"WordPress\">\n<thead>\n<tr>\n<th>Type of risk<\/th>\n<th>Potential consequences<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Domain penalized for SEO<\/td>\n<td>Low ranking on Google<\/td>\n<\/tr>\n<tr>\n<td>Legal dispute involved<\/td>\n<td>Loss of domain, being sued<\/td>\n<\/tr>\n<tr>\n<td>Spam links\/bad backlinks<\/td>\n<td>Loss of reputation, loss of traffic<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Takeaway<\/h3><p>Kh\u00f4ng ki\u1ec3m\u200c tra \u200dk\u1ef9 t\u00ean mi\u1ec1n \u200cc\u00f3 th\u1ec3 khi\u1ebfn doanh nghi\u1ec7p \u0111\u00e1nh m\u1ea5t uy \u2064t\u00edn, ti\u1ec1n b\u1ea1c v\u00e0 c\u1ea3 c\u01a1 h\u1ed9i ph\u00e1t tri\u1ec3n th\u01b0\u01a1ng \u200chi\u1ec7u. \u0110\u1ea7u t\u01b0 v\u00e0i \u200dgi\u1edd th\u1ea9m \u200b\u0111\u1ecbnh k\u1ef9 thu\u1eadt \u2013 ph\u00e1p l\u00fd\u200d tr\u01b0\u1edbc\u200c khi mua t\u00ean\u200c mi\u1ec1n c\u00f3 th\u1ec3 gi\u00fap \u200btr\u00e1nh h\u1eadu qu\u1ea3 k\u00e9o d\u00e0i \u200ch\u00e0ng th\u00e1ng.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/domain.jpg\" alt=\"Guide to registering and protecting your domain name to avoid hijacking\" title=\"\"><\/p><h2 id=\"huong-dan-dang-ky-va-bao-ve-ten-mien-de-tranh-bi-chiem-doat\">Guide to registering and protecting domain names to avoid hijacking<\/h2><h3>1. How to register a domain name properly<\/h3><p>When starting to build a website, the first thing you need to do is check if the domain is available and register it as soon as possible. Here are the steps you should take:<\/p><ul>\n<li>Choose a reputable domain registrar recognized by ICANN (e.g.: Namecheap, GoDaddy, Mat Bao).<\/li>\n<li><strong>Check domain status<\/strong> via free tools such as WHOIS or official domain checking sites.<\/li>\n<li>Register for at least 2-3 years to reduce the risk of forgetting to renew.<\/li>\n<\/ul><div class=\"wp-block-group has-background\" style=\"padding:15px\">\n  <strong>\ud83d\udca1 Tip:<\/strong> N\u00ean \u0111\u0103ng\u2064 k\u00fd t\u1ea5t c\u1ea3 c\u00e1c\u2063 bi\u1ebfn th\u1ec3 c\u1ee7a t\u00ean mi\u1ec1n (.com, .vn, .net) \u0111\u1ec3 tr\u00e1nh b\u1ecb \u0111\u1ed1i th\u1ee7 \u201c\u0111\u00e1nh \u00fap\u201d\u2064 sau n\u00e0y.\n<\/div><h3>2. Checklist to protect your domain from hijacking<\/h3><p>In fact, according to a DomainTools report (2022), 1 in 13 small and medium-sized businesses have lost access to their domain at least once due to security negligence.<\/p><p><strong>domain security checklist:<\/strong><\/p><ul>\n<li>\u2705 Enable feature <strong>Domain Lock<\/strong><\/li>\n<li>\u2705 Update <strong>administrative contact email<\/strong> accurately and securely<\/li>\n<li>\u2705 Enable two-factor authentication (2FA) for domain admin account<\/li>\n<li>\u2705 Enable automatic annual domain renewal<\/li>\n<li>\u2705 Regularly monitor DNS access logs<\/li>\n<\/ul><h3>3. Real-life examples and lessons learned<\/h3><p>A small business in the online education sector once lost their .vn domain because they missed a renewal email from the provider. The domain was purchased by a reseller in less than 5 days, forcing them to pay nearly 30 million VND to regain usage rights. Similar cases occur more than 2,100 times each year in Vietnam (source: VNNIC 2023).<\/p><table class=\"WordPress\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr>\n<th>Risks<\/th>\n<th>Solutions<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Forgot to renew<\/td>\n<td>Set reminders + enable auto-renewal<\/td>\n<\/tr>\n<tr>\n<td>Domain hijacked by hackers<\/td>\n<td>Enable 2FA and Domain Lock<\/td>\n<\/tr>\n<tr>\n<td>No WHOIS control<\/td>\n<td>Use information privacy service<\/td>\n<\/tr>\n<\/tbody>\n<\/table><div class=\"wp-block-group has-background\" style=\"background-color:#f0fff4;padding:15px;margin-top:20px\">\n  <strong>\ud83d\udc49 Takeaway:<\/strong> T\u00ean mi\u1ec1n\u2063 l\u00e0 t\u00e0i s\u1ea3n s\u1ed1 c\u1ed1t l\u00f5i \u2013 h\u00e3y \u0111\u0103ng k\u00fd s\u1edbm, b\u1ea3o v\u1ec7 k\u1ef9\u200b v\u00e0 ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 tr\u00e1nh nh\u1eefng thi\u1ec7t h\u1ea1i \u0111\u00e1ng ti\u1ebfc di\u1ec5n ra.\n<\/div><p><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/hority.jpg\" alt=\"Optimizing domain management in your business&#039;s digital marketing campaigns\" title=\"\"><\/p><h2 id=\"toi-uu-hoa-viec-quan-ly-ten-mien-trong-chien-dich-marketing-so-cua-doanh-nghiep\">Optimize domain management in your business's digital marketing campaign<\/h2><h3>Why is domain management a long-term strategy?<\/h3><p>Regularly checking and monitoring domains helps businesses ensure consistent brand identity across all digital platforms. According to Verisign's report (2023), <a href=\"https:\/\/dps.media\/en\/bulk-dns-lookup-optimized-solution-for-domain-name-management\/\" rel=\"nofollow\">c\u00f3 h\u01a1n 354 \u200dtri\u1ec7u t\u00ean mi\u1ec1n \u0111\u00e3 \u200d\u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd \u2013 \u0111i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c t\u00ecm ki\u1ebfm t\u00ean mi\u1ec1n ph\u00f9 h\u1ee3p \u200cv\u00e0 b\u1ea3o \u2062v\u1ec7 th\u01b0\u01a1ng \u2064hi\u1ec7u\u2062 tr\u1edf n\u00ean c\u1ea5p thi\u1ebft<\/a>.<\/p><p>Some reasons to prioritize domain management:<br>\n\u2013 Duy tr\u00ec quy\u1ec1n s\u1edf h\u1eefu v\u00e0 gi\u1ea3m\u200b r\u1ee7i ro\u2062 b\u1ecb chi\u1ebfm\u200c d\u1ee5ng<br>\n\u2013 Ng\u0103n ch\u1eb7n th\u1ea5t\u200d tho\u00e1t traffic t\u1eeb c\u00e1c \u200bmi\u1ec1n\u2064 ph\u1ee5\/mi\u1ec1n\u2063 t\u01b0\u01a1ng t\u1ef1<br>\n\u2013 D\u1ec5 d\u00e0ng t\u00edch h\u1ee3p \u2064t\u00ean mi\u1ec1n trong c\u00e1c chi\u1ebfn d\u1ecbch \u200cqu\u1ea3ng \u2063c\u00e1o \u0111a\u200d k\u00eanh\u200c (cross-channel)<\/p><h3>Periodic steps to take<\/h3><p>To optimize domain management, you should follow a specific process:<\/p><ul>\n<li>Check WHOIS status and domain registration expiry date<\/li>\n<li>Renew your domain at least 30 days before expiration<\/li>\n<li>Update DNS according to social media and email marketing campaigns<\/li>\n<li>Monitor threats from fake websites (brandjacking)<\/li>\n<li>Continuously review similar domain variants to prevent risks<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n  <strong>TIP:<\/strong> S\u1eed \u2063d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 DomainTools ho\u1eb7c Google Workspace\u2064 Admin \u0111\u1ec3 gi\u00e1m s\u00e1t bi\u1ebfn \u0111\u1ed9ng DNS & email\u2062 spoofing.\n<\/div><h3>Periodic domain management checklist<\/h3><table class=\"wordpress\">\n<thead>\n<tr>\n<th>Task<\/th>\n<th>Frequency<\/th>\n<th>Responsibilities<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Gia \u2064h\u1ea1n & ki\u1ec3m \u200ctra t\u00ean mi\u1ec1n<\/td>\n<td>Every 6 months<\/td>\n<td>IT or Website Administrator<\/td>\n<\/tr>\n<tr>\n<td>Scan domain variants<\/td>\n<td>Quarterly<\/td>\n<td>Marketing team<\/td>\n<\/tr>\n<tr>\n<td>ki\u1ec3m tra\u200c DNS\u200c & email SPF<\/td>\n<td>Monthly<\/td>\n<td>System management<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf & l\u01b0u \u200c\u00fd quan\u200d tr\u1ecdng<\/h3><p>An e-commerce startup in Ho Chi Minh City lost access to their main domain because they forgot to renew it and a competitor bought it. As a result, they lost 35% organic traffic in the first 2 weeks (according to Google Analytics, Q1\/2024). Leaving a gap in domain management can seriously affect revenue.<\/p><div class=\"wp-block-group has-background\">\n  <strong>WARNING:<\/strong> Do not store login information in shared places or fail to enable two-factor authentication when managing domains.<\/div><h3>Takeaway<\/h3><p><strong>Domain names are core digital assets<\/strong> \u2013 vi\u1ec7c qu\u1ea3n l\u00fd\u2063 ch\u1eb7t ch\u1ebd kh\u00f4ng ch\u1ec9\u200c li\u00ean \u2063quan \u0111\u1ebfn nh\u1eadn \u2063di\u1ec7n th\u01b0\u01a1ng hi\u1ec7u, m\u00e0 c\u00f2n \u200b\u1ea3nh h\u01b0\u1edfng tr\u1ef1c\u2062 ti\u1ebfp\u200c \u0111\u1ebfn hi\u1ec7u qu\u1ea3 \u2062c\u1ee7a\u2063 chi\u1ebfn \u2064d\u1ecbch marketing. \u0110\u1eebng \u2062\u0111\u1ec3 \u201cm\u1ea5t\u2062 d\u1ea5u ng\u01b0\u1eddi\u2063 d\u00f9ng\u201d ch\u1ec9\u2062 v\u00ec thi\u1ebfu s\u00f3t trong vi\u1ec7c ki\u1ec3m\u2064 tra t\u00ean mi\u1ec1n website. <\/p><h2 id=\"outro\">Negative balance still remains<\/h2><p>Domain checking helps you clearly understand ownership, availability, and website performance. This is an important step to building a strong online brand image.<\/p><p>Try the free domain checking tool now to choose the right domain. This is the first action to help you kickstart an effective digital presence.<\/p><p>You can learn more about how to choose a domain name according to SEO or brand naming strategies. These topics help you better reach your target customers.<\/p><p>DPS.MEDIA always accompanies SMEs on their digital business transformation journey. 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