Look up who owns a domain name and when it was registered.

WHOIS and RDAP lookup for domains and IP addresses. Displays registrar, registrant (where not redacted), registration and expiry dates, nameservers, and abuse contact. Uses the RDAP protocol where available.

Primary: RDAP (Registration Data Access Protocol, RFC 9083) via the ICANN bootstrap registry (rdap.org) for TLD-specific RDAP servers. Structured JSON response parsed for entity roles (registrant, registrar, administrative, technical), event dates (registration, expiration, last changed), and nameservers. Fallback to WHOIS (port 43) via server-side proxy for TLDs without RDAP coverage. GDPR/ICANN redaction of registrant PII is common for gTLDs.