A DNS lookup queries the Domain Name System to find the records associated with a domain — such as its IP address (A/AAAA), mail servers (MX), or text records (TXT). This tool performs a real, live lookup via Cloudflare's public resolver and returns the actual current records.
DNS (Domain Name System) translates human-readable domain names like example.com into the IP addresses computers use to route traffic. Different record types serve different purposes: A/AAAA records point to servers, MX records route email, TXT records hold verification and policy data (like SPF/DKIM), and NS records identify a domain's authoritative name servers.
http:// or a trailing path) — or an IP address if using PTR.Different DNS resolvers can briefly disagree while changes propagate, and results are cached per record's TTL (time to live) — a lower TTL means changes show up faster everywhere.
NXDOMAIN means the domain doesn't exist in DNS at all — check for typos, or the domain may not be registered.
Yes — enter the full hostname, e.g. mail.example.com.
DNSSEC (DNS Security Extensions) lets a resolver cryptographically verify that a response hasn't been tampered with. "Validated" means Cloudflare's resolver confirmed the response's signature chain; "not validated" usually means the domain simply doesn't have DNSSEC configured, not that anything is wrong.
Select PTR, then enter an IP address (IPv4 or IPv6) instead of a domain name — this looks up the hostname associated with that IP, if one exists.