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DNS Lookup

Query A, AAAA, MX, TXT, NS, and CNAME records for any domain.

How it works

This tool queries Cloudflare’s public DNS-over-HTTPS resolver (1.1.1.1) directly from your browser. No data passes through our servers — the query goes from your browser to Cloudflare and back. Results are exactly what Cloudflare’s authoritative resolver returns for the domain you enter.

What each record type tells you

  • A — IPv4 address. The most common record. example.com A 93.184.216.34 means “example.com resolves to 93.184.216.34”.
  • AAAA — IPv6 address. Same idea as A, but for IPv6.
  • MX — Mail exchange servers. Tells email senders which hosts accept mail for this domain. Includes a priority (lower = preferred).
  • TXT — Arbitrary text records. Used for SPF, DKIM, DMARC, domain ownership verification, and many other things. Often the most informative records to inspect.
  • NS — Name servers. Tells DNS clients which servers are authoritative for this domain’s zone.
  • CNAME — Canonical name (alias). Points one hostname at another. Common for CDNs and SaaS subdomains.

Common uses

  • Confirming DNS changes propagated — check whether a record update you just made is live globally.
  • Debugging email delivery — check MX, SPF (TXT), DKIM (TXT), and DMARC (TXT) records.
  • Reverse-engineering competitor infrastructure — check which CDN, mail provider, or hosting they use.
  • Verifying your domain points where you expect — check A records before troubleshooting a website outage.

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