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DNSChecker vs MXToolbox: catalog facts
DNSChecker	MXToolbox
Free Free to use in the browser.	Freemium Lookups on the site are free to use, with paid plans offered alongside.
Web	Web
Shows results from many resolvers in different countries at once Covers a wide range of record types, including DNSSEC records	Many email and DNS checks in one place MX lookups query the authoritative server directly
Shows what resolvers return but does not diagnose configuration errors	Pages carry prompts for the paid service Each check runs separately rather than as one combined report
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account 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.