Nameserver Checker
List the authoritative nameservers for a domain, check that every nameserver resolves, and flag inconsistencies between the parent delegation and the zone itself.
About the Nameserver Checker
List the authoritative nameservers for a domain, check that every nameserver resolves, and flag inconsistencies between the parent delegation and the zone itself.
Queries run from our global edge network, so you see what a neutral observer on the public internet sees — not what your local network or ISP resolver happens to have cached.
Frequently asked questions
What does the Nameserver Checker do?
List the authoritative nameservers for a domain, check that every nameserver resolves, and flag inconsistencies between the parent delegation and the zone itself.
Is the Nameserver Checker free to use?
Yes. The Nameserver Checker is completely free with no account, no signup and no usage limits for normal use.
Do you log the lookups I run?
No. Queries are processed at the edge and returned straight to you. We do not retain, profile or sell your lookup history.