DNS Traversal – visualize the resolution chain
Trace the path of a DNS query from root to TLD to authoritative name servers and identify delegation, latency and response issues.
Configure DNS Trace
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Guide & best practices
DNS Traversal – visualize the resolution chain
Trace the path of a DNS query from root to TLD to authoritative name servers and identify delegation, latency and response issues.
How does DNS resolution work?
Iterative DNS resolution follows the hierarchy from root servers to TLD servers and finally to authoritative name servers.
Root → TLD → Authoritative
Each layer points to the next one until the authoritative server returns the requested record.
Detect lame delegation
Lame delegation occurs when a delegated name server does not answer authoritatively or is unreachable.
Interpreting latency
High latency at one stage can indicate distant, overloaded or poorly connected name servers.
Frequently asked questions
What is iterative DNS resolution?
It means a resolver queries responsible servers step by step instead of receiving the final answer immediately.
What is an authoritative name server?
An authoritative name server is responsible for a DNS zone and returns definitive answers for its records.
What is lame delegation?
It happens when a name server is delegated at the registry but does not correctly answer for the domain.
What are glue records and when are they needed?
Glue records are A/AAAA entries for the name servers placed directly in the parent zone. They are needed when the name server lives inside its own domain (in-bailiwick, e.g. ns1.example.com for example.com) to avoid a resolution loop.
How do I interpret high latency at one stage?
Compare response times per level: if the TLD stage is fast (12 ms) but the authoritative server slow (350 ms), it suggests geographic distance or load – geo-distributed, redundant name servers improve the values.