DNS Lookup
Look up A, AAAA, CNAME, MX, NS, and TXT records for any domain. Great for checking SPF/DMARC, troubleshooting email, and verifying DNS changes.
Quick answer: Look up A, AAAA, CNAME, MX, NS, and TXT records for any domain. Great for checking SPF/DMARC, troubleshooting email, and verifying DNS changes.
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Frequently asked questions
- How do I check the DNS records for a domain?
- Type the domain (no http://) and click Look up. We query the six most useful record types in parallel and show each one.
- What's the difference between A and AAAA?
- A maps a domain to an IPv4 address; AAAA maps it to an IPv6 address. Domains often have both so visitors on either network can reach them.
- What does a CNAME record do?
- A CNAME makes one hostname an alias for another. www.example.com → example.com is the classic case. CNAMEs aren't allowed on the apex (root) of a zone.
- How do I find MX records for email?
- MX records publish the mail servers that accept mail for a domain. Each entry has a priority (lower = preferred) and an exchange hostname.
- What is a TXT record?
- Free-form text records used for verification (Google site verification), SPF policies, DMARC policies, DKIM keys, and other metadata that doesn't fit another type.
- How do I check SPF and DMARC?
- Look at the TXT records: SPF starts with v=spf1, DMARC sits at _dmarc.example.com and starts with v=DMARC1.
- Why do I see an old DNS result?
- DNS responses are cached for the TTL the zone publishes. Until that TTL expires, resolvers return the old data. Lower the TTL before a planned change to shorten the wait.
- What is TTL?
- Time-to-live: how long, in seconds, a resolver may cache a record before re-asking the authoritative server.
- Why doesn't my domain work after a DNS change?
- Either the change hasn't propagated everywhere yet (TTL), or the new record is wrong. Use the DNS Propagation Checker to compare resolvers.
- Can I compare DNS records between providers?
- Yes — use the DNS Propagation Checker, which queries Cloudflare, Google, and Quad9 in parallel so you can see disagreements.