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NS Record Checker
List the authoritative name servers for a domain and confirm delegation, helpful for DNS changes, registrar updates, and troubleshooting resolution issues.
How to use this tool
- Enter the domain name and run an NS lookup.
- Review delegated nameservers, TTL, and additional glue data.
- Export findings when auditing registrar changes or provider migrations.
Delegation checks
- Confirm domains point to the intended authoritative DNS provider.
- Validate secondary nameserver coverage for resilience.
- Compare resolver output against registrar control panel settings.
Operational guidance
- Account for long NS propagation windows when planning cutovers.
- Maintain multiple nameservers on separate infrastructure.
- Investigate parent-zone delegation if resolver responses look stale.
FAQ
- Why might unknown nameservers appear?
- Registry or resolver caches may still reflect older delegations until TTL expiry after a provider change.
- Does this include glue records?
- Yes. When returned, glue A/AAAA records appear in the Additional section of the DNS response.
- How many NS records should a domain have?
- Most domains use at least two authoritative nameservers for redundancy and policy compliance.
Resources
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