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Robtex vs IP Lookup: catalog facts
Robtex	IP Lookup
Free Lookups are free on the website.	Free Free and open source under the GPL.
Web	Linux
Many lookup types from one search page Covers AS numbers and AS macros as well as domains and IPs	Simple single-purpose interface Adaptive layout for Linux phones
Web service only Research shows lookups rather than any monitoring or alerting	Linux only Limited to IP information lookups
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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