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