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DNSChecker vs Who.is: catalog facts
DNSChecker	Who.is
Free Free to use in the browser.	Freemium Lookups are free; domain history reports and monitoring are paid services.
Web	Web
Shows results from many resolvers in different countries at once Covers a wide range of record types, including DNSSEC records	WHOIS, RDAP, DNS and IP lookups in one site Reverse nameserver lookup
Shows what resolvers return but does not diagnose configuration errors	Full domain history requires a paid report Monitoring is a premium service
Web application	Web application, Hosted service
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 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.