netlupaLook up a domain's nameservers (NS)
NS records say which servers hold the domain's official information. Enter the domain to see them.
What is an NS record?
NS (Name Server) records say which servers are authoritative for a domain, that is, which ones hold its official records. They are set at the domain's registrar and published on the TLD's servers (.com, .org…).
If you change DNS provider, for example to move to Cloudflare, these are the records you change. Until the change propagates, some resolvers will ask the old servers and others the new ones.
Lookups by record type
Frequently asked questions
Why are there at least two NS servers?
For redundancy: if one fails, the domain keeps resolving with the other. Domain registries require at least two.
How long does a DNS change take to propagate?
As long as the old record's TTL: from a few minutes to 24 or 48 hours. Nameserver (NS) changes usually take longer, because the TTL of the delegation in the TLD is high.
What does NXDOMAIN mean?
That the name you looked up does not exist in DNS: the domain is not registered, has expired or was mistyped.
Which DNS servers does this tool ask?
No middleman: Netlupa runs its own resolver, which starts from the root servers and asks each domain's official DNS servers directly.
Can I do a reverse DNS lookup of an IP?
Yes: look the IP up with the API (/api/dns/ptr/8.8.8.8) or use the WHOIS tool to find out who it belongs to.
Why do I see a different value than in my DNS panel?
Because resolvers still have the previous value cached. Wait for the time shown in the TTL, or check that you edited the zone at the provider listed in the NS records: if the domain uses other DNS servers, changes in your panel have no effect.
What is a record's TTL?
The time, in seconds, other servers may keep the answer before asking again. 3600 is one hour. A low TTL makes changes show up sooner, at the cost of more queries.