SharkDNS guide
3 min readReverse NS lookup and shared nameservers
Discover domains that share authoritative name-server infrastructure with a target.
reverse NS lookupshared nameserversauthoritative DNSDNS infrastructure
When to use it
Reverse NS lookup helps identify domains that use the same authoritative name servers. It is useful for finding related projects, parked domains, and domains managed under the same DNS provider setup.
What it means
A shared NS result means domains overlap on name-server infrastructure. This may indicate common management, the same DNS provider, or simply many customers using a popular hosted DNS service.
How to avoid false assumptions
Always compare the actual NS hostnames and the provider context. Shared public DNS providers can create broad overlaps that do not imply ownership.
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