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Who.isWhoisThisDomain
Freemium

Lookups are free; domain history reports and monitoring are paid services.

 Free

Freeware from NirSoft, free to use and redistribute unmodified.

Web Windows
  • WHOIS, RDAP, DNS and IP lookups in one site
  • Reverse nameserver lookup
  • Chooses the WHOIS server automatically by TLD
  • Batch lookups and name-and-extension combinations
  • Full domain history requires a paid report
  • Monitoring is a premium service
  • Only queries WHOIS servers on port 43, not web-based WHOIS
  • Proxy authentication with a user name and password is not supported
Web application, Hosted service Downloadable app
Closed source Closed source
License not stated License: Freeware
Not stated if an account is needed No account needed
Needs internet Needs internet

Checked September 23, 2026

Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.