NS Lookup
Find the nameservers responsible for a domain.
An NS lookup returns the nameservers that are authoritative for a domain — the servers holding its real DNS records. After changing DNS provider these are the values that must update before anything else takes effect.
Start a check
Public internet targets onlyResults
Ready when you are
Enter your details above and run the tool.
How NS Lookup works
What it does
Find the nameservers responsible for a domain.
What you get
Authoritative nameserver hostnames.
Live data sources
The target is sent to a network provider. Results include their source; timeouts and unavailable data are clearly marked.
What if a check cannot finish?
Confirm your input and try again. A timeout, blocked request, or unavailable provider is not proof that a domain is broken. Internet measurements and third-party services have limits.
NS Lookup — frequently asked questions
I changed nameservers but the old ones still show. Why?
Nameserver changes go through the domain registry and are cached by resolvers, often for 24–48 hours. Until that clears, some resolvers keep using the old set.
How many nameservers should a domain have?
At least two, on separate networks, so the domain still resolves if one fails. Most providers give you between two and four.
Do the nameservers have to match the ones at my registrar?
Yes. The registrar's delegation is what the rest of the internet follows. Records added at a provider you have not delegated to are never consulted.