DNS Lookup
Query DNS records for any domain — A, AAAA, CNAME, MX, TXT, NS, SOA, CAA — right from your browser, with TTLs, DNSSEC status and ASN/hosting hints.
Queries go straight from your browser to public DNS-over-HTTPS resolvers. The domain you enter is never sent to or stored on this site's server.
What is this tool?
A free DNS lookup that runs entirely in your browser using public DNS-over-HTTPS resolvers. Enter a domain and get all eight record types (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA) with their TTLs, a simplified DNSSEC verdict, and ASN/hosting hints for A and AAAA addresses.
How to use
- Enter a domain name (internationalized domains work too) and press "Look up".
- Turn on "Compare resolvers" to see Google Public DNS and Cloudflare side by side, with differences highlighted.
- Fill in an expected value to mark A/AAAA records green (match) or red (mismatch).
- Share results with the permalink button, download them as CSV, or review the observation history (stored only in your browser).
Common errors
- NXDOMAIN: the domain does not exist — check the spelling or try the parent domain.
- SERVFAIL: the DNS server failed, often due to a DNSSEC misconfiguration. Use the DNSViz link for a deeper analysis.
- Stale results: resolvers cache answers until the TTL expires; wait and query again.
About the subdomain list
DNS itself can only return records for the exact name you query — subdomains are not part of a normal lookup. The subdomain list shown here comes from HackerTarget's public passive DNS data. It is not guaranteed to be complete or up to date, but it is a quick way to discover publicly visible subdomains; clicking one looks it up directly.
Privacy
Queries are sent directly from your browser to public DNS-over-HTTPS resolvers. The domains you enter and the results never pass through this site's server. The observation history lives only in your browser's local storage.
ASN and country data come from Team Cymru DNS queries. When the site operator configures an ipinfo.io token, IP data is provided by ipinfo.io Lite (CC BY-SA 4.0, IP data: ipinfo.io).
FAQ
Is the domain I look up sent to this site's server?
No. Queries go directly from your browser to public DNS-over-HTTPS resolvers (Google Public DNS and Cloudflare). Nothing is sent to or stored on this site.
Which record types are queried?
All eight supported types (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA) are always queried in parallel, and results are grouped by type.
What does "Compare resolvers" show?
It queries Google Public DNS and Cloudflare side by side and highlights differing values. It compares the cached view of two public resolvers only — it does not show global propagation.
Where is the observation history stored?
Only in your browser's local storage; it is never sent anywhere. Recording starts with your first lookup, and you can delete it at any time from the history panel. For longer-term history, see third-party data such as SecurityTrails.
Why don't DNS results include subdomains?
A DNS query only returns records for the exact name being asked about — looking up example.com cannot reveal names like www.example.com. The subdomain list in this tool comes from HackerTarget's passive DNS data (DNS observations collected by a third party).
Can I look up an IP address (reverse DNS)?
Not yet — only domain names are supported. Entering an IP address shows an error.
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