DNS Lookup (DNS: Domain Name System)

Check A, AAAA, MX, NS, and TXT DNS records in one place. Use this tool when migrating hosting, configuring email, validating SPF/DKIM/DMARC, or debugging domain resolution issues.

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What each record type means

  • A: maps domain to IPv4 address.
  • AAAA: maps domain to IPv6 address.
  • MX: defines mail server routing.
  • NS: authoritative name servers for zone.
  • TXT: text records (SPF, DKIM, DMARC verification, etc.).

Useful methods

  1. Run DNS lookup before and after DNS changes to verify updates.
  2. Check MX and TXT together when troubleshooting email deliverability.
  3. Compare A/AAAA records with expected hosting IPs to avoid misrouting.
  4. Validate NS records when domain shows intermittent resolution issues.

Tips and tricks

  • Keep TTL strategy in mind during migrations; lower TTL before planned cutovers.
  • If results look old, use our DNS Propagation Checker.
  • For email setup, verify SPF syntax and DKIM selector records separately.
  • Use multiple checks over time to avoid one-time resolver cache confusion.

FAQ

Why does one resolver show different records? Cached responses and propagation windows can differ by resolver.

Can I use this for subdomains? Yes, enter full hostname like api.example.com.

Does this tool modify DNS? No, this is read-only lookup.

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