What is an NS record?
Understand how NS records define authoritative nameservers and why delegation matters.
What NS records do
NS records identify the authoritative nameservers for a domain or delegated subdomain.
They tell resolvers where authoritative DNS answers should come from.
Why they are important
If NS records are wrong or incomplete, a domain can become difficult or impossible to resolve correctly.
They are also important when changing DNS providers or delegating parts of a namespace.
What to check
- Whether the nameservers match your intended DNS provider
- Whether delegation is correct at the parent zone
- Whether the nameserver hostnames themselves resolve correctly