Helpful does not mean guaranteed.

Web Diagnostic Tools is an educational pilot. It does not promise uptime, rankings, delivery, security or a particular DNS answer.

Verify consequential changes

Before changing DNS, mail, redirects or crawl rules, confirm the provider’s current documentation, keep a rollback path and test from the affected environment. Public resolver output is an observation, not authority.

No professional advice

Nothing here is legal, tax, security, infrastructure or compliance advice. Seek a qualified professional for decisions where failure has material impact.

External services

The DNS checker may contact a public resolver. External services have their own availability and privacy practices. See Privacy & Cookies.