{"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>Checking domain names &amp; free website domain checks is the first step in deciding the success of an online brand.<\/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>- A small company in Hanoi was forced to change its web name after 3 months due to a domain name violation overlapping with a registered trademark.<br>\n- According to the WIPO report (2022), more than 5,600 domain name disputes occurred globally in the past year.<\/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>- Google has the ability to retain negative \u201ctraces\u201d of the old domain.<br>\n- Tools like Wayback Machine or Ahrefs support free domain history lookups.<\/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>- A tech startup in Da Nang had to spend over $3,000 to buy back a domain name due to skipping the initial check step.<br>\n- According to the ICANN Report (2023), more than 24% of startup businesses are forced to change their domain names in the first year of operation.<\/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> A few minutes of checking domain names can help you save months \u2013 even years \u2013 of time and costs for brand editing, avoiding unnecessary risks and building a safe web foundation from the start.<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> Owner authentication &amp; expiration date.<\/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> Please check on 2-3 tools to avoid confusing the status \u201cdomain name already registered\u201d or \u201cabout to expire\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 Be registered as early as possible to avoid being \u201cstolen\u201d (on average, 5 new domains are registered every minute - 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>Check, compare &amp; suggest domain extensions<\/td>\n<\/tr>\n<tr>\n<td>DPS.MEDIA tool<\/td>\n<td>Yes<\/td>\n<td>Integrate checking &amp; pricing for multiple domain tails<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>4. Real-life example from a small business<\/h3><p>A logistics service startup in Binh Duong lost its original domain name just 24 hours after searching with a free tool but not registering immediately. They were forced to negotiate a buyback at 10 times the price \u2013 from 250,000 VND to 2,500,000 VND (source: survey <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> internal partners, 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 Whois data can be hidden \u2013 multiple verification sources need to be combined.<\/li>\n<li>\u26a0\ufe0f Some free tools may save logs &amp; resell query information.<\/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>Checking domain names is an important first step to protect the online brand for SMEs. Be proactive, check multiple sources and register as soon as possible \u2013 so that each domain name is a long-term asset, not lost just because of being one step late.<\/p><p>- DPS.MEDIA JSC - Digital Marketing Solutions for 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>Vietnamese SMEs &amp; startups<\/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>A good domain name not only helps with clear brand identity but also supports increasing long-term promotion efficiency. Don't just look at beauty \u2013 look at strategy.<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 Has a good usage history (PAS \u2013 Page Authority score \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>Creative search &amp; suggestions<\/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>- A domain name previously penalized by Google for containing SEO-violating content can negatively affect the ranking of a new website.<br>\n- Metrics such as <strong>Domain Authority (DA)<\/strong> or <strong>Spam score<\/strong> may be low or flagged.<br>\n- According to Ahrefs (2023), more than 60% of expired domains have backlinks from malicious sites.<\/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>- Domain names may be related to registered trademarks, leading to the risk of litigation.<br>\n- Some cases where domain names contain keywords matching large brand names, such as \u201cadidasvn.com\u201d, have been revoked for infringing intellectual property rights. - According to WIPO (World Intellectual Property Organization), 5,616 domain disputes occurred in 2022 \u2013 an 11% increase over the previous year.<\/p><h3>Impact on reputation and marketing<\/h3><p>- If the domain name was previously used for adult content, gambling, or scams, users may lose trust in the new brand.<br>\n- Warning: Advertising tools like Google Ads may reject domain names with a history of violations.<br>\n- A business in HCM took more than 3 months to restore the right to run ads because they chose a domain name that had been blocked.<\/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>Not checking the domain name carefully can cause businesses to lose reputation, money, and brand development opportunities. Investing a few hours in technical \u2013 legal appraisal before buying a domain name can help avoid consequences lasting for months.<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> It is recommended to register all variations of the domain name (.com, .vn, .net) to avoid being \u201cambushed\u201d by competitors later.\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> Domain names are core digital assets \u2013 register early, protect carefully, and check periodically to avoid unfortunate damages.\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\">there are more than 354 million registered domain names \u2013 this makes finding the right domain name and protecting the brand urgent<\/a>.<\/p><p>Some reasons to prioritize domain management:<br>\n- Maintain ownership and reduce the risk of misappropriation<br>\n- Prevent traffic loss from subdomains\/similar domains<br>\n- Easily integrate domain names in cross-channel advertising campaigns<\/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> Use tools like DomainTools or Google Workspace Admin to monitor DNS fluctuations &amp; email 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>Renew &amp; check domain names<\/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>check DNS &amp; email SPF<\/td>\n<td>Monthly<\/td>\n<td>System management<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Real-world examples &amp; important notes<\/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> - strict management is not only related to brand identity, but also directly affects the effectiveness of marketing campaigns. Don't let \u201close track of users\u201d just because of an oversight in checking the website domain name. <\/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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