Free tools / Network

WHOIS & RDAP lookup

Query the authoritative registry for a domain, IP address, or AS number. Uses RDAP (RFC 9082) with automatic discovery through the IANA bootstrap registries, falling back to port-43 WHOIS for TLDs that never deployed RDAP.

Results include the complete record published by the authority, including contact details when present. The registry or registrar may already redact fields under its own policy. Usage limits and registry acceptable-use terms apply.