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ASN Lookup Tool and Traceroute Server vs Robtex: catalog facts
ASN Lookup Tool and Traceroute Server	Robtex
Free Free and open source under the MIT license.	Free Lookups are free on the website.
Self-hosted, Command line	Web
Looks up ASN, RPKI, BGP and IP information Supports bulk and JSON output	Many lookup types from one search page Covers AS numbers and AS macros as well as domains and IPs
Some reconnaissance features use Shodan.	Web service only Research shows lookups rather than any monitoring or alerting
Downloadable app, Self-hosted	Web application
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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