IP WHOIS / RDAP lookup
Look up organization, address block and abuse contact for a public IP through RDAP.
Google DNS
Cloudflare
OpenDNS
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How to interpret
This tool queries IP address registrations at RIRs, not domain registration or expiration. The IANA bootstrap selects the responsible regional registry. Compare organization, range and abuse contact; these identify network allocation, not the individual generating traffic. Missing fields may reflect registry policy.