Free tools
The DNS checks we run for customers, free for anyone
Each tool below is the same engine DoDomain uses to connect and verify customer domains, pointed at a domain you type in. They read the zone's own authoritative nameservers, not a cache, and they say not probed where they did not look rather than guessing. No account, no JavaScript required.
- DNS provider detector
Which DNS host serves a domain, and whether one-click setup is available there.
- DNS propagation checker
One record, read from the authoritative nameservers and three public resolvers.
- SPF record checker
Parse a domain's SPF, walk its includes, count the lookups against the limit of ten.
Need this inside your product?
The provider detector is POST /api/v1/domains/check in the DoDomain API, and the verification behind the propagation checker is what runs on every custom-domain connection. The free plan includes both.