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Who.is vs ICANN Lookup: catalog facts
Who.is	ICANN Lookup
Freemium Lookups are free; domain history reports and monitoring are paid services.	Free Free public lookup service run by ICANN.
Web	Web
WHOIS, RDAP, DNS and IP lookups in one site Reverse nameserver lookup	Run by ICANN rather than a registrar or advertiser Uses RDAP instead of scraping WHOIS
Full domain history requires a paid report Monitoring is a premium service	Only shows registration data, with no DNS or mail diagnostics
Web application, Hosted service	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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