What is the DNS Lookup tool?
DNS Lookup resolves a domain name into the records that the rest of the internet sees for it — the
A records (IPv4 addresses), AAAA records (IPv6), MX mail exchangers, TXT
records (SPF, DKIM, domain verification tokens), NS name servers, CNAME aliases, SOA
zone authority, and CAA certificate-authority authorization. Everything you'd normally run dig for,
but directly in your browser with no server-side proxy.
How it works
The lookup uses DNS-over-HTTPS (DoH, RFC 8484)
against Cloudflare's cloudflare-dns.com resolver. DoH wraps DNS queries inside HTTPS so they're encrypted in
transit and unblockable by classic DNS port filters. The JSON response is parsed entirely in your browser; only the domain
you type is ever sent — and only to Cloudflare, not to us. Cloudflare's
public-resolver privacy policy
describes their data handling in detail.
Record types at a glance
- A / AAAA — IPv4 / IPv6 addresses for the domain.
- MX — mail servers and their priorities. Required to deliver email to the domain.
- TXT — arbitrary text records. Used for SPF, DKIM, Google site verification, domain-ownership proofs, and many DNS-based ACME challenges.
- NS — the authoritative name servers for the zone. Useful for verifying delegation.
- CNAME — alias one name to another. Heavily used by CDNs and platform-as-a-service hosting.
- SOA — start-of-authority: serial, refresh, retry, expire, minimum-TTL. Tells you when a zone was last updated and where to ask for transfers.
- CAA — which certificate authorities are allowed to issue TLS certs for the domain. Increasingly important for hardening certificate issuance.
Tips
- Pick ALL for a single-shot audit — the tool fires 8 parallel queries and merges the results.
- The query-time figure below the table reflects only network round-trip plus parsing — Cloudflare's recursive resolver caches aggressively, so repeats are typically < 20 ms.
- Some browsers extend Same-Origin Policy quirks to DoH. If a request fails with no response, check that no privacy extension is blocking
cloudflare-dns.com.