`;const ta = root.querySelector('#dns-lines'); const btnRun = root.querySelector('#dns-run'); const btnStop = root.querySelector('#dns-stop'); const btnClear = root.querySelector('#dns-clear'); const typesWrap = root.querySelector('#dns-types'); const statusEl = root.querySelector('#dns-status'); const errorEl = root.querySelector('#dns-error'); const errorTextEl = root.querySelector('#dns-error-text'); const resultsEl = root.querySelector('#dns-results'); const delayInput = root.querySelector('#dns-delay'); const btnCopy = root.querySelector('#dns-copy-table'); const countEl = root.querySelector('#dns-count'); const progressEl = root.querySelector('#dns-progress'); const progressBarEl = root.querySelector('#dns-progress-bar'); const runTextEl = root.querySelector('#run-text');// Type pills với DPS branding const TYPE_LABELS = { 'ALL': 'TẤT CẢ', 'A': 'A', 'CNAME': 'CNAME', 'MX': 'MX', 'NS': 'NS', 'TXT': 'TXT' };let activeType = 'A'; RECORDS.forEach(t => { const b = document.createElement('button'); b.textContent = TYPE_LABELS[t] || t; b.className = 'dns-type-btn'; if (t === activeType) { b.classList.add('active'); } b.addEventListener('click',()=>{ if (isRunning) return; activeType = t; [...typesWrap.children].forEach(c => c.classList.remove('active')); b.classList.add('active'); }); typesWrap.appendChild(b); });// Domain count tracker với DPS colors function updateDomainCount() { const domains = ta.value.split(/\r?\n/) .map(s=>extractHostname(s)) .filter(Boolean); countEl.textContent = `${domains.length} tên miền`; if (domains.length > 100) { countEl.style.background = 'rgba(220,38,38,0.9) !important'; countEl.style.color = 'white !important'; } else if (domains.length > 50) { countEl.style.background = 'rgba(245,158,11,0.9) !important'; countEl.style.color = 'white !important'; } else if (domains.length > 0) { countEl.style.background = 'rgba(50,181,97,0.9) !important'; countEl.style.color = 'white !important'; } else { countEl.style.background = 'rgba(21,21,119,0.9) !important'; countEl.style.color = 'white !important'; } }ta.addEventListener('input', updateDomainCount); updateDomainCount();function clampDelay(){ let v = Number(delayInput.value || 0); if (!Number.isFinite(v) || v { if (e.key === '-') e.preventDefault(); });function extractHostname(input){ if(!input) return ''; try{ return new URL(input).hostname.replace(/\.$/,''); } catch(e){ return String(input).trim().replace(/^https?:\/\//i,'').replace(/^\/*/,'').split('/')[0].split('?')[0].replace(/\.$/,''); } }function sleep(ms){ return new Promise(r=>setTimeout(r, ms)); }function clearError(){ errorEl.style.display='none'; errorTextEl.textContent=''; } function showError(msg){ errorEl.style.display='flex'; errorTextEl.textContent=msg; } function setStatus(msg){ statusEl.textContent = msg; }function updateProgress(current, total) { if (total === 0) { progressEl.style.display = 'none'; return; } progressEl.style.display = 'block'; const percentage = Math.min((current / total) * 100, 100); progressBarEl.style.width = `${percentage}%`; }// Render table với DPS branding - Sử dụng div thay vì table elements function ensureTable(){ if(resultsEl.firstChild && resultsEl.firstChild.classList && resultsEl.firstChild.classList.contains('dns-table')) return resultsEl.firstChild; resultsEl.innerHTML = ''; const table = document.createElement('div'); table.className = 'dns-table'; const isMobile = window.innerWidth

`; resultsEl.appendChild(table); return table; }const allRows = []; function appendRows(rows){ const table = ensureTable(); const tbody = table.querySelector('.dns-table-body'); const frag = document.createDocumentFragment(); const isMobile = window.innerWidth { allRows.push(r); const tr = document.createElement('div'); tr.className = 'dns-table-row'; let dataColor = '#374151'; if (r.data === '(không có dữ liệu)') dataColor = '#9ca3af'; else if (r.data && r.data.startsWith('Lỗi:')) dataColor = '#dc2626'; tr.innerHTML = `

`; frag.appendChild(tr); }); tbody.appendChild(frag); btnCopy.disabled = false; btnCopy.classList.remove('success'); }async function queryDoH(domain, type){ const base = 'https://dns.google/resolve'; const params = new URLSearchParams(); params.set('name', domain); params.set('type', TYPE_CODE[type]); const url = `${base}?${params.toString()}`; const res = await fetch(url, { headers: { 'Accept':'application/json' }}); if(!res.ok) throw new Error(`HTTP ${res.status}`); return await res.json(); }let abortFlag = false; let isRunning = false;btnStop.addEventListener('click', ()=>{ abortFlag = true; setStatus('🛑 Stopping...'); });btnClear.addEventListener('click', () => { if (isRunning) return; resultsEl.innerHTML = `

`; allRows.length = 0; btnCopy.disabled = true; btnCopy.classList.remove('success'); clearError(); setStatus(''); progressEl.style.display = 'none'; });btnRun.addEventListener('click', async ()=>{ if (isRunning) return; clearError(); allRows.length = 0; abortFlag = false; isRunning = true;btnRun.disabled = true; runTextEl.textContent = '⏳ Running...'; btnStop.style.display = 'block'; btnClear.style.display = 'none'; [...typesWrap.children].forEach(b => { b.style.cursor = 'not-allowed'; b.style.opacity = '0.6'; });const delay = clampDelay();const domains = ta.value.split(/\r?\n/) .map(s=>extractHostname(s)) .filter(Boolean);if (!domains.length){ showError('Please enter at least 1 domain.'); resetUIState(); return; } if (domains.length > 100){ showError('Limit 100 domains per run to avoid overload. Please split the list.'); resetUIState(); return; }const types = (activeType==='ALL') ? [...POPULAR] : [activeType]; const totalQueries = domains.length * types.length;resultsEl.innerHTML = ''; ensureTable();let completed = 0; for (let i=0; i 0){ const rows = json.Answer.map(a=>({ domain:d, type:t, name:a.name, ttl:a.TTL, data:a.data })); appendRows(rows); } else if (json && Array.isArray(json.Authority) && json.Authority.length > 0){ const rows = json.Authority.map(a=>({ domain:d, type:t, name:a.name, ttl:a.TTL, data:a.data })); appendRows(rows); } else { appendRows([{ domain:d, type:t, name:'', ttl:'', data:'(không có dữ liệu)' }]); } }catch(e){ appendRows([{ domain:d, type:t, name:'', ttl:'', data:`Lỗi: ${e.message}` }]); } completed++; updateProgress(completed, totalQueries); if (completed { b.style.cursor = 'pointer'; b.style.opacity = '1'; }); }function escapeCell(v){ if (v == null) return ''; const s = String(v); return s.replace(/\t/g, ' ').replace(/\r?\n/g, ' '); } function rowsToTSV(rows){ const header = ['Tên Miền','Loại','Tên','TTL','Dữ Liệu']; const lines = [header.join('\t')].concat(rows.map(r => [r.domain, r.type, r.name||'', r.ttl??'', r.data||''].map(escapeCell).join('\t'))); return lines.join('\n'); } async function copyText(text){ if (navigator.clipboard && navigator.clipboard.writeText){ await navigator.clipboard.writeText(text); } else { const ta = document.createElement('textarea'); ta.value = text; document.body.appendChild(ta); ta.select(); document.execCommand('copy'); document.body.removeChild(ta); } } btnCopy.addEventListener('click', async ()=>{ if (!allRows.length){ setStatus('❌ Không có dữ liệu để sao chép.'); return; } try{ await copyText(rowsToTSV(allRows)); setStatus('✅ Đã sao chép bảng vào clipboard!'); const originalText = btnCopy.textContent; btnCopy.textContent = '✅ Đã sao chép!'; btnCopy.classList.add('success'); setTimeout(() => { btnCopy.textContent = originalText; btnCopy.classList.remove('success'); }, 2000); }catch(e){ setStatus('❌ Sao chép thất bại: ' + e.message); } });// Window resize handler let resizeTimeout; window.addEventListener('resize', () => { clearTimeout(resizeTimeout); resizeTimeout = setTimeout(() => { if (resultsEl.firstChild && resultsEl.firstChild.classList && resultsEl.firstChild.classList.contains('dns-table')) { const currentRows = [...allRows]; allRows.length = 0; resultsEl.innerHTML = ''; if (currentRows.length > 0) { appendRows(currentRows); } } }, 100); });// Initialize copy button state btnCopy.disabled = true; })();Checking domain information is the first and most important step to protect your digital assets. 90% small businesses face the risk of losing domain usage rights due to lack of knowledge about management.

DPS.MEDIA has supported hundreds of SMEs to understand domains clearly, helping them minimize the risk of losing their online brand. Mastering the information helps you control and secure your domain more effectively.

The importance of checking domain name information in digital business strategy

Direct impact on brand & customer trust

Domain name is an essential part of brand identity in the digital environment. If you do not check and fully verify domain information, businesses may face risks such as duplicate domains, easy impersonation, or association with malicious content.

– 60% users say they have less trust in websites using non-transparent domains (Trustpilot Report, 2022)
– A startup company in Hanoi lost nearly 300 million VND due to domain .com hijacking after only registering the .vn version without comprehensive ownership checks (internal anonymous case study)

Checking helps secure and prevent scams

Periodic scanning and verification of domain information helps detect:

– Unauthorized DNS changes
– Expired domains or transfers without notice
– Phishing campaigns using similar fake domains

An ICANN survey (2023) shows that up to 12% of SMEs are scammed through emails impersonating similar domains.

Checklist: 5 things to do when managing domain

• Periodic WHOIS lookup (every 6 months)
• Enable domain lock mode (Domain Lock)
• Backup DNS configuration and check MX record
• Automatic renewal and set notifications before expiration
• Monitor domain variants (typosquatting)

Domain status summary table & warnings

Short takeaway:

Checking domain information not only protects the brand but is also an indispensable part of safe and efficient operations on digital platforms. A small action can prevent major risks.

Steps to check domain name information accurately and quickly

1. Identify the domain management location

First, you need to identify where the domain is being managed – it could be GoDaddy, Namecheap, PA Vietnam, or another provider. This helps you know where to access to view DNS configuration, manage SSL, or set security.

• Access https://whois.domaintools.com/ to look up information
• Note the Registrar (registrar) and Name Server

2. Look up detailed WHOIS information

WHOIS is a popular method to check the status and ownership information of a domain name. However, nowadays many providers apply policies to hide owner information (WHOIS Privacy) for security reasons.

Below is a sample WHOIS information table that may appear after lookup:

3. Checklist of specific items to check

After obtaining information from WHOIS, you should proceed to review according to the following action list:

• ✔ Is the domain name activated and still within expiration date?
• ✔ Is WHOIS Privacy applied (hiding personal information)?
• ✔ Are nameservers pointing correctly to the server in use?
• ✔ Verify the domain administrator email to avoid losing access rights
• ✔ Check DNS settings: MX, TXT (SPF/DKIM), A records

Real examples & risk warnings

in a domain audit, an SMEs customer in Q.3, HCM discovered the domain expired 3 days ago and was transferred to “Redemption Period” status. The cost to restore is $120 USD at Name.com (2023).

According to ICANN WHOIS Accuracy Reporting System – Report 2023, 18% domain names registered with wrong email or blank contact information, hindering renewal and complaint retrieval.

Short takeaway

Periodic domain information checks should be considered a basic security process every 6 months. Prioritize keeping accurate contact, DNS control, and expiration monitoring to minimize all digital operation interruption risks.

Decoding important WHOIS information fields and how to understand correctly

Domain ownership information

This is the main part that helps determine who is the legitimate owner of the domain. Common fields include:

– Registrant Name (Registrant's name)
– Registrant Organization (Owning organization – if any)
– Email, address, and main contact phone number

📝 If anonymous (Privacy protection), the system will display proxy address – this is common with registrars like Namecheap or Google Domains.

Example: A fashion store owner using domain “examplefashion.vn” lost it because the domain was under the old partner's name, unaware of the email in WHOIS – leading to a 3-month dispute.

Technical and management information

You need to pay attention to the following fields to avoid unwanted domain loss:

– Registrar: The registrar managing the domain (e.g., P.A Vietnam)
– Name Server: The system directing traffic to the web host
– Status: Domain status, for example:
– clientTransferProhibited: currently locked for transfer
– redemptionPeriod: domain renewed late and suspended

Accurate WHOIS check checklist

• Verify if the owner's information is accurate?
• Is the admin email still accessible?
• Is the domain status locked?
• Is the registrar reputable and supportive?

Comparison table of common domain statuses:

Takeaway: Reading WHOIS is not difficult, but it needs to be correct

Understanding WHOIS data helps you protect your brand, avoid risks of losing domain control and maintain stable operations. Always check WHOIS periodically every 3-6 months, or when changing hosting service providers.Source: ICANN WHOIS Accuracy Reporting System Report (2023) – outdated WHOIS rate in SMEs accounts for over 46%.

Domain security strategy to avoid risks and loss of ownership

1. Enable domain lock and two-step verification

One of the most basic security steps is enable Domain Lock to prevent unauthorized domain transfers.In addition, ensure the domain admin account has two-factor authentication (2FA) enabled for enhanced security.

2. Use separate contact info and update regularly

Use a dedicated separate email for domain management, avoid personal email or shared internal emails. According to Verisign's report (2023),26% of domain losses originate from weak or leaked admin emails.

• Update contact information every 6-12 months
• Avoid public WHOIS if not necessary
• Enable Privacy Protection if appropriate

3. Register long-term and monitor expiration date

There have been many cases of domain loss due to forgetting renewal – especially in SMEs. Example: a retail business in Ho Chi Minh City once lost its main domain because it only registered for 1 year and did not receive renewal notifications due to old email.

Here is a short tracking table to help you manage domain expiration effectively:

Domain security checklist

• ☑️ Enable domain lock (Domain Lock)
• ☑️ Enable 2FA for admin account
• ☑️ Use separate email for domain
• ☑️ Renew at least 2-3 years/time
• ☑️ Track expiration dates to avoid service interruptions

Domain security summary

Losing a domain name not only causes brand damage but also affects reputation and SEO. Maintaining basic security strategies like the above will ensure your domain is hard to compromise – regardless of any business scale.

Guide to effectively update and manage domain information at the registrar

Update owner information correctly and completely

Maintaining accurate owner information helps you avoid the risk of losing domain control. According to ICANN (2023), 12% cases of domain hijacking originate from inaccurate WHOIS information.
List of information to check periodically:

• Owner name matches the business registration license (if any)
• Contact email always active
• Valid phone number and postal address
• Technical and admin information must be clearly separated

Set up and periodically check security options

Most registrars today provide the feature domain lock – a security layer that prevents unauthorized domain transfers.
Example: A DPS.MEDIA customer once nearly lost domain usage rights because domain lock was not enabled, despite owning it for 5 years.

List of recommended actions:

• Enable the feature 2FA (two-factor authentication) for domain management accounts
• Always use strong passwords, change every 6 months
• Enable domain lock immediately upon domain registration
• Set up email alerts for information changes

Periodic information checklist

Warning: Common risks

– Illegally transferred due to expired or hacked email
– Temporarily lost ownership due to incorrect WHOIS information – violating ICANN regulations
– Loss of traffic quality and reputation if domain expires without timely renewal

Takeaway:

The effective domain management and security is not only a legal responsibility but also a vital factor for the digital brand. Set up periodic maintenance reminders like server check schedules to help you minimize risks and protect your online assets more securely.

Optimizing domain management process to enhance online brand reputation

Why manage domain tightly?

Domain governance is not just a mandatory technical step, but also a strategic factor to preserve brand image. According to Cisco's Global Cybersecurity Report (2023), over 33% phishing incidents originate from poor domain control.

A recent example is a domestic retail business that lost control of its main domain just because it expired without timely renewal. Result: lost 63% natural traffic in just 2 weeks.

Suggested standard process to optimize domain management

Below is a suggested checklist to help you effectively control domain operations and protect your brand:

• ✔ Check WHOIS registration information periodically (at least once per quarter)
• ✔ Enable domain lock (Domain Lock) to prevent takeover
• ✔ Use company shared email for registration – avoid personal email
• ✔ Update DNS accurately, avoid mispointing or exposing internal structure
• ✔ Set up 2FA for domain management account

Centralized multi-platform domain management

If the business owns multiple domains for sub-brands or marketing campaigns, focus on centralized management with a dashboard or service. Some platforms like Google Domains or Namecheap allow you to sync and track all domains on 1 console.

Example of domain management statistics table:

Warning: Risks often overlooked

– Register domain but not protect WHOIS information → Easily exploited by competitors.
– Not update ownership when personnel changes → Risk of losing ownership.
– Use unofficial providers → Difficult to regain control in disputes.

Key Points

A clear domain management process, secure and regularly controlled will help your online brand maintain credibility, avoid hijacking, while effectively supporting marketing operations and long-term recognition.

Reliable domain checking and security tools and software for small businesses

Free domain information checking tools

To grasp the status and history of the domain, you need to regularly use lookup tools. Some free, easy-to-use solutions:

• Whois Lookup (ICANN, Whois.com): Lookup owner information, registration date, provider.
• DomainTools: Provides reliability score and domain update history.
• MXToolbox: Check DNS setup, blacklist, email server related to the domain.

Domain security software for SMEs

Small businesses are often targets of domain attacks due to low investment in security. Some reliable software to consider:

• Cloudflare: DNS protection, anti-DDoS, helps speed up connections.
• Google Domains (or Google Workspace): Integrates two-factor authentication and alerts for unusual activity.
• SSL Labs by Qualys: Evaluate the strength level of the SSL certificate.

Quarterly domain management and security checklist

The table below is a simple quarterly checklist:

Real example: Small vulnerability, big loss

In 2022, an SME business in the furniture sector let its domain expire for 3 days due to forgetting to renew. Another entity bought back the domain and exploited the old reputation to scam customers via email. This incident caused damages over 80 million VND and nearly 1 month of suspended sales operations (Source: VietnamBiz, 2022).

Short takeaway

businesses should proactively use domain checking tools and periodic domain security solutions. This is not only part of digital brand protection but also an essential defense layer against increasingly growing technological risks.

Sincere-Impressions

Checking domain information helps businesses control ownership and limit security risks. Proper domain management is the first step in a sustainable digital marketing strategy.

Start reviewing the domain information you own. Update admin contacts, set up security, and register long-term for absolute safety. You should also learn about SSL, DNS, and effective hosting management. These are important factors directly related to website performance and reliability.

DPS.MEDIA is always ready to accompany Vietnamese businesses on their digital transformation journey. Don't forget to leave a comment if you have questions or want to share domain experiences!