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Robtex vs DNSDumpster: catalog facts
Robtex	DNSDumpster
Free Lookups are free on the website.	Free Free to use in the browser.
Web	Web
Many lookup types from one search page Covers AS numbers and AS macros as well as domains and IPs	Nothing to install Quick overview of a domain's visible hosts
Web service only Research shows lookups rather than any monitoring or alerting	Intended for authorized testing and checking your own domains Results depend on publicly available DNS data
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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