NS Lookup
Enter a domain and press Look up. The tool asks the selected public resolver for the domain’s NS records; if the name is not a zone apex, it reports the zone from the SOA record and looks up that zone’s nameservers instead. It then resolves each nameserver’s A and AAAA addresses.
This lookup runs in an isolated frame on net.freetoolspro.com. Advertising on this page cannot read what you type or the results.
How it works
The widget sends an NS query to Cloudflare or Google Public DNS over HTTPS. If the answer is empty and the resolver returns an SOA record in the authority section, the SOA owner is the enclosing zone, so the NS query is repeated for that zone. Optional A/AAAA queries are made for up to eight nameserver host names.
What is sent, and to whom
The domain you type, the nameserver host names found, and connection metadata such as your IP address go to the selected resolver. No other service receives them, and the advertising scripts on this page cannot read the isolated net.freetoolspro.com frame.
Limits
This shows the recursive resolver’s view of the NS set published in the zone. It does not query the parent TLD servers directly, so it cannot prove the registrar delegation matches, and it is not a global propagation check.
Common questions
I changed nameservers at my registrar. Why do I still see the old ones?
Resolvers cache NS records for their TTL, and TLD delegation changes can take hours. Check again after the TTL shown in the table has elapsed.
Why is a nameserver missing an IPv6 address?
Not every nameserver publishes an AAAA record. Missing IPv6 is common and not an error by itself.
Methodology reviewed 2026-10-27. Processing details and test approach.