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Who.is vs DNSChecker: catalog facts
Who.is	DNSChecker
Freemium Lookups are free; domain history reports and monitoring are paid services.	Free Free to use in the browser.
Web	Web
WHOIS, RDAP, DNS and IP lookups in one site Reverse nameserver lookup	Shows results from many resolvers in different countries at once Covers a wide range of record types, including DNSSEC records
Full domain history requires a paid report Monitoring is a premium service	Shows what resolvers return but does not diagnose configuration errors
Web application, Hosted service	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account 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.