Compare software

WhoisThisDomain vs Whois.com Lookup: catalog facts
WhoisThisDomain	Whois.com Lookup
Free Freeware from NirSoft, free to use and redistribute unmodified.	Free Lookups are free on the website.
Windows	Web
Chooses the WHOIS server automatically by TLD Batch lookups and name-and-extension combinations	Looks up both domain names and IP addresses Shows registrar, dates and nameservers in one result
Only queries WHOIS servers on port 43, not web-based WHOIS Proxy authentication with a user name and password is not supported	Owner details depend on what the registry publishes and are often redacted
Downloadable app	Web application
Closed source	Closed source
License: Freeware	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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