Run a DNS health check

Review the records most commonly needed for websites, email routing, anti-spoofing and certificate policy.

Diagnostic

What is checked?

The tool queries web addresses, mail exchangers, nameservers, SPF text, DMARC policy and CAA records. It also reports whether the public resolver marked any returned data as authenticated by DNSSEC.

Limits

This is a public DNS snapshot. It does not prove that a web server is healthy, that email will reach the inbox, or that every part of a DNSSEC chain is configured exactly as intended.