Delegation Checker

Compare parent delegation NS records with the child zone, then check for SOA serial consistency across child authoritative nameservers.

Results

No delegation check run yet.

Related Tools

DNS Propagation Checker

Compare answers across public resolvers.

Record Lookup

Query A, AAAA, CNAME, NS, PTR, SOA, SRV, CAA, and TXT records.

Dangling CNAME Checker

Check whether a CNAME target looks dead or takeover-prone.

Related Articles

How to Check DNS Delegation Correctly

Learn how to check DNS delegation by comparing parent and child NS records, SOA responses, and glue records to find broken or inconsistent delegation.

How to Read NS Records Correctly

Learn how to read NS records, understand what they say about delegation, and spot signs of stale nameservers, mismatches, or broken authority.

What is an NS record?

Learn what NS records do, how nameserver delegation works, and how to troubleshoot DNS authority and resolution issues in real-world setups.