IP Whois Inspector

An IPv4 and IPv6 network registration, ASN ownership, and Regional Internet Registry (RIR) lookup client for Linux.
A lightweight Linux alternative to WhosIP for inspecting IP allocations, netblocks, autonomous systems, and abuse contacts directly from authoritative RIR servers.

Key features:
- Queries whois.iana.org over RFC 3912 TCP port 43 and automatically chases referrals to ARIN, RIPE NCC, APNIC, LACNIC, and AFRINIC with per-hop latency tracking.
- Queries RFC 7480 and RFC 9083 HTTPS RDAP endpoints to parse structured CIDR prefixes, entity roles, vCard abuse email and phone contacts, and registration timestamps.
- Extracts NetRange, CIDR, NetName, Organization, Origin ASN, Country, Abuse contacts, registration dates, and reverse DNS PTR hostnames.
- Displays the complete hop-by-hop WHOIS referral transcript, RDAP entity hierarchy, and exports structured CSV and JSON network ownership reports.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by NirSoft, IANA, ARIN, RIPE NCC, APNIC, LACNIC, or AFRINIC.