Compare software

quien vs IPNetInfo: catalog facts
quien	IPNetInfo
Free Free and open source under the MIT licence.	Free Freeware from NirSoft that may be redistributed free of charge.
Windows, Command line	Windows
WHOIS, DNS, mail, TLS and HTTP checks in one view Readable tabbed TUI instead of raw whois text	Extracts IP addresses from pasted email headers Queries all five regional internet registries
Terminal only Young project from a single developer	Needs an internet connection and outgoing access to port 43 Official requirements list Windows 98 to Windows 10 only
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License: Freeware
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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