Free tool
IP WHOIS Lookup
Registry WHOIS / RDAP for any IPv4 or IPv6 address or prefix, with origin ASN, geolocation, abuse contact and reverse DNS.
About this tool
Find who operates an IP address or block: registry WHOIS and RDAP records, the announcing ASN, network name, allocation range, abuse contact, reverse DNS and approximate network geolocation.
Lookups are rate-limited and logged for abuse prevention. Results reflect public routing data and registries.