Glue Record Checker

Check whether a domain uses in-bailiwick nameservers, whether glue is likely required, and whether the nameserver hostnames currently resolve to A or AAAA records.

Results

No glue record check run yet.

What this tool does

Glue records matter when a domain is delegated to nameservers that sit inside the same domain, such as ns1.example.com for example.com. In those cases, the parent zone usually needs address information for the nameserver so resolvers can find it without circular dependency.

This tool checks the nameserver hostnames, whether they are in-bailiwick, and whether those hostnames currently resolve to A or AAAA records.

When this tool is useful

  • Troubleshooting broken or inconsistent delegation
  • Checking self-hosted or in-bailiwick nameserver setups
  • Reviewing DNS before registrar or provider migrations
  • Explaining likely glue dependencies during troubleshooting

Related Tools

Whois Lookup

Inspect domain registration, registrar, and nameserver information.

Dangling CNAME Checker

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

Delegation Checker

Compare parent delegation, child NS records, and SOA serials.

Related Articles

Common Glue Record Problems: DNS Delegation Issues Explained

A troubleshooting guide to glue record issues, including in-bailiwick nameservers, missing glue, delegation mismatches, and how to fix DNS resolution failures.

What are glue records?

Learn what glue records are, when they are required, and why they are critical for keeping in-bailiwick nameserver delegation resolvable.

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.