WHOIS Lookup

Universal WHOIS lookup for IP addresses, ASNs and domains.

One tool for WHOIS lookups across IP addresses, Autonomous System numbers and domains. The correct registry is discovered automatically from IANA data.

The correct regional registry is discovered automatically from IANA data.

Related tools

Domain WHOIS LookupFind registration details and expiry for a domain.IP WHOIS LookupFind the registrant and network details behind an IP block.ASN WHOIS LookupLook up the owner and details of an Autonomous System Number.

Frequently asked questions

Which WHOIS server is used?

The authoritative server for the TLD or IP block is discovered from IANA's public registry, so the correct one is always used.