Nameserver Checker & Monitor

Track your domain's authoritative nameservers and get alerted the moment they change.

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Your nameservers are the foundation everything else sits on: they decide where your domain points, where your email is delivered, and which server answers for your site. If they change without your knowledge, it is one of the loudest warning signs there is — a domain transfer you did not authorise, a registrar account takeover, or an outright hijack. A nameserver checker records your authoritative nameservers and tells you the instant they change.

What it checks
  • The authoritative nameservers (NS records) for your domain
  • The SOA record — primary nameserver, serial number and zone timers
  • Nameservers added or removed since the last check
  • Unexpected changes that can signal a domain transfer or hijack
  • A recorded baseline so every future check has something to compare against

Why it matters

A nameserver change hands control of your entire domain to whoever made it — its website, its email, its subdomains. Attackers who compromise a registrar account change nameservers precisely because it is quiet and devastating, and legitimate-but-unannounced changes (a provider migration, a contractor's edit) can break mail and DNS just as badly. Because nobody watches the registrar by default, the change is usually noticed only after something breaks. Monitoring turns that into an immediate alert.

How BrandSentryPro does it

Add your domain as a monitor and BrandSentryPro resolves its authoritative nameservers and SOA, stores them as a baseline, and re-checks over time. When the nameserver set changes, it shows you exactly which servers were added and removed and flags the change so you can confirm it was you — or act fast if it was not.

Frequently asked questions

What is a nameserver?
A nameserver is the authoritative DNS server responsible for answering queries about your domain — where its website, email and other services live. The NS records at your domain's zone list which nameservers are in charge.
Why would my nameservers change?
Legitimate reasons include moving to a new DNS or hosting provider, or a registrar migration. But an unexpected change can mean a domain transfer you did not authorise or a hijack via a compromised registrar account — which is why monitoring matters.
What should I do if my nameservers changed unexpectedly?
Treat it as urgent. Log in to your registrar to confirm whether the change was authorised, check for account compromise, and revert the nameservers if it was not you. Catching it early — before email and DNS fully cut over — is the difference between a scare and an outage.

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All in one place

Run this check automatically

Add a monitor and BrandSentryPro keeps every check running for you — with alerts the moment something needs attention.

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