Check a domain. Debug a connection. Simplify your workflow.
Sixty focused tools, all in one place.
Compare DNS answers across public resolvers.
Find configuration issues in your DNS records.
Find the hostname associated with an IP.
Inspect the DNS records behind a domain.
Follow a domain’s canonical name records.
Find the nameservers responsible for a domain.
Find mail servers and delivery priorities.
Inspect sender policies and lookup limits.
Check email policy, alignment and reporting.
Review DNS and email configuration together.
Create a DMARC record with guided settings.
Inspect the public keys used by DNSSEC.
Look up delegation signer records.
Look up a domain’s email signing key.
Local calculations stay in your browser. Network checks show their source and limitations.