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IP2WHOIS

Free WHOIS lookup service for domain names and IP addresses, providing registration details, registrant information, location data, and API access.

domain-name
Official docs ↗

Platforms: Web · Last verified September 7, 2026

Free WHOIS lookup service for domain names and IP addresses, providing registration details, registrant information, location data, and API access.

Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.

Getting started

Best for: Domain and IP WHOIS lookups, registrant research. See the official site linked above for details.