Nameserver records and delegation
Authoritative nameservers publish the records for a DNS zone. A parent zone delegates authority to nameservers for a child zone, while the child zone can also publish its own NS records. These sets should be coordinated, but a recursive answer is not a direct proof of the parent’s current delegation.
What this tool verifies
The checker requests NS records through a public resolver and shows answer and relevant authority records when supplied. It does not perform an iterative trace from the DNS root or query the parent zone directly. To verify delegation, compare your registrar’s configured nameservers and use an authoritative DNS trace. Do not treat cached NS answers as confirmation that a registrar change has completed.
Diagnosing a nameserver change
Confirm the domain’s registrar, the exact assigned nameserver hostnames and any required glue records. When using private nameservers such as ns1.yourdomain.com, an A record by itself is not the same as registering glue at the registrar. Check that the destination DNS zone is ready before switching delegation, then compare answers from public resolvers. Subdomains may inherit their parent zone unless separately delegated.