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Check-Host vs ViewDNS.info: catalog facts
Check-Host	ViewDNS.info
Free The checks are used in the browser at no cost.	Freemium The web tools are free; API access and research data are sold on paid plans.
Web	Web
Checks run from many locations around the world at once Covers ping, HTTP, TCP, UDP and DNS in one place	Many DNS, WHOIS and IP tools in one place Historical data such as IP history and reverse WHOIS
Web service only, with no self-hosted version Page carries advertising for hosting services	Some features such as dark mode need an account API and data products are paid
Web application	Web application, Hosted service
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.