Free nameserver checker · Instant · No signup

Nameserver Checker

Check your nameservers and DNSSEC. Domain Doctor confirms you have at least two working nameservers and reports whether DNSSEC is signing your zone.

19 checks per scan Results in seconds Free, no signup

The tool

What the Nameserver Checker checks

Your nameservers answer every DNS query for your domain. Best practice is at least two, ideally on different networks, so a single outage does not take your whole domain, website and email, offline.

Domain Doctor lists your NS records, checks you have redundancy, identifies the provider, and reports whether DNSSEC is enabled to cryptographically protect your DNS answers from tampering.

How it works

Check your domain in three steps

1Enter your domainType any domain into the box above and start the free scan. No signup, no software.

2We inspect it liveDomain Doctor reads your NS records and checks DNSSEC, in real time from our servers.

3Get a clear verdictYou get a plain-language result, the exact records we found, and a concrete fix if anything is wrong.

What to watch for

Common Nameserver Checker problems

Only one nameserver (no redundancy)
Nameservers at the registrar not matching the zone
DNSSEC enabled but broken (SERVFAIL)
Lame delegation to a nameserver that does not answer

VASTROX DNS

Redundant, validated DNS delegation

VASTROX runs your DNS across multiple nameservers with clean delegation and optional DNSSEC.

Multiple redundant nameservers
Clean parent and child delegation
DNSSEC signing available

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Questions

Frequently asked

How many nameservers should I have?

At least two, and ideally on separate networks or providers, so your domain stays resolvable if one goes down.

What is DNSSEC?

DNSSEC cryptographically signs your DNS records so resolvers can detect tampering. It is optional but adds strong integrity protection when configured correctly.