Free · no signup

DNS Lookup

Resolve A, AAAA, MX, NS, TXT and CNAME records — and see whether DNSSEC is enabled.

Reading your DNS records

DNS is the address book of the internet: it maps your domain to the servers that host your site and mail. When something looks wrong here — a missing MX, an unexpected A record, the wrong nameservers — it usually explains an outage or a delivery problem.
A / AAAA
The IPv4 / IPv6 addresses your domain points to.
MX
The mail servers that receive email for your domain.
NS
The nameservers authoritative for your zone.
TXT
Verification and policy records (SPF, DKIM, DMARC, ownership).
CNAME
Aliases that point one name at another.
DNSSEC
Signatures that let resolvers detect tampered answers.

Frequently asked questions

A DNS lookup queries the Domain Name System for a domain’s records — the A/AAAA addresses it points to, the MX servers that receive its mail, the NS nameservers that host its zone, and TXT/CNAME records used for verification and aliases.

DNSSEC cryptographically signs your DNS records so resolvers can detect tampering (cache poisoning / spoofing). This tool shows whether signing records were found for the domain.

Yes — that’s what CompleteStatus does. It snapshots your records and alerts you the moment an A, MX or NS record changes unexpectedly, which is an early sign of a hijack or misconfiguration.

Don’t check it once — watch it 24/7

An unexpected A, MX or NS change is often the first sign of a hijack. CompleteStatus runs this exact check around the clock and alerts you the moment something changes — before your users (or attackers) notice.
Monitor this free Try the other free tools
Uptime is table stakes. We watch the rest — security headers, email authentication, certs and DNS, with the fix attached.
Start free
Company
© 2026 CompleteStatus. All rights reserved. CompleteStatus — operated in the United States · support@completestatus.com