Tra Cứu DNS

Kiểm tra DNS records, WHOIS thông tin domain và SSL certificate. Công cụ miễn phí, nhanh chóng cho developers và system admins.

Enter Domain Name

📖 DNS Record Types

  • A: IPv4 address of the domain
  • AAAA: IPv6 address of the domain
  • MX: Mail exchange servers for email delivery
  • TXT: Text records for verification and SPF/DKIM
  • NS: Nameserver records indicating authoritative DNS servers
  • CNAME: Canonical name record (alias to another domain)

What is DNS Lookup?

DNS Lookup is a tool to query Domain Name System (DNS) records for any domain. It shows IP addresses, mail servers, nameservers, and other domain configuration details. Essential for troubleshooting and domain management.

Why Use Our DNS Lookup Tool?

  • Free & Unlimited: Query unlimited domains without restrictions
  • Multiple Record Types: Check A, AAAA, MX, TXT, NS, and CNAME records
  • Fast Queries: Get DNS information in seconds using Google DNS API
  • Secure: No data logging, all queries are anonymous

Common Use Cases

  • Troubleshooting: Diagnose email delivery or DNS configuration issues
  • Domain Verification: Verify DNS propagation after domain changes
  • Migration Planning: Check current DNS setup before moving hosts

Frequently Asked Questions

What is DNS?

DNS (Domain Name System) is like the internet's phone book. It translates human-readable domain names (like example.com) into IP addresses that computers use.

How long does DNS propagation take?

DNS changes can take 24-48 hours to propagate worldwide due to caching. Use this tool to check if changes have propagated to Google's DNS servers.

What is an MX record?

MX (Mail Exchange) records specify which mail servers handle email for your domain. They're essential for email delivery.

Why do I see multiple A records?

Multiple A records often indicate load balancing or redundancy. Traffic is distributed across multiple servers for better performance and reliability.

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