NS / Nameserver Lookup
See which nameservers are authoritative for a domain.
How this lookup works
NS records name the servers with authority over a domain’s DNS. When you change your DNS host, these are what you update at the registrar, and they are what the rest of the internet follows to find everything else about the domain.
What the results mean
- Nameserver
- A server authoritative for the domain. Most domains list two to four for redundancy.
- They differ between resolvers
- A nameserver change has not finished propagating. Registrar changes to NS records can take up to 48 hours to settle everywhere.
Frequently asked questions
How many nameservers should a domain have?
At least two, and most have between two and four. A single nameserver is a single point of failure — if it goes down, the domain becomes unreachable even though nothing is wrong with the site itself.
I changed nameservers and still see the old ones
NS changes are made at the registrar and propagate slowly — allow up to 48 hours. Until then, resolvers that cached the old delegation will keep using it.