Find out who owns a domain
Whois is often redacted since privacy rules came into force, but the information frequently remains accessible elsewhere: in Whois history, in certificates, or in old versions of the site. The creation date is almost always visible, and often the most useful indicator.
The tools, in order
- 01ViewDNS.infofree
Bundles about twenty network tools, including Whois and reverse IP
Comprehensive DNS lookup and WHOIS service providing detailed DNS records, reverse IP lookups, reverse WHOIS searches, and API access for automated queries.
- 02Who.isfree
Simple, readable Whois lookup
Comprehensive WHOIS and RDAP lookup service with large database of domain registration, DNS records, and IP information. Provides both current and historical data.
- 03
Detailed presentation, with history elements
Enterprise-grade WHOIS API with decades of historical domain data and rapid query response. The industry leader for threat intelligence and domain tracking.
- 04SecurityTrailsfreemium
History of name servers and IP addresses
Comprehensive DNS and domain intelligence platform. Access historical DNS records, WHOIS data, IP neighbors, subdomain enumeration and attack surface data for any domain.
- 05
Old legal notices often reveal the owner
Web archive providing historical snapshots of websites captured over time.
The pitfall to avoid
A redacted Whois does not mean the registrant is anonymous: they often remain visible in history, or appear in an old version of the site.
🧭 The full plan
The copilot orders every step from your starting point, with pre-filled queries.
📖 The detailed guide
The full method, step by step, with edge cases.