DNS & domain lookup

Nameserver Migration Checker

Track a nameserver migration by comparing registry delegation (RDAP) with live nameservers (DNS), and against your target set. Free, using real RDAP and DNS.

Check a nameserver migration

Enter a domain, and optionally the new nameservers you are migrating to.

What this migration checker does

Compares registry delegation (RDAP) with live NS (DNS)
Optionally checks against your target nameservers
Tells you whether the migration has propagated
Flags when delegation and resolvers disagree
Uses real RDAP and DNS data
Runs live over RDAP and DNS-over-HTTPS

Common use cases

  1. 1Tracking a nameserver change to a new DNS host
  2. 2Confirming a migration has fully propagated
  3. 3Diagnosing why some users still hit the old provider
  4. 4Verifying registrar delegation matches your setup
  5. 5Planning a safe cutover window
  6. 6Auditing nameservers after a transfer

Related tools

NS Record LookupDNS Propagation CheckerWHOIS LookupDNS Health CheckerDNS diff toolDNS TTL planner

About nameserver migrations

Changing DNS providers means updating your domain's nameserver delegation at the registrar. That change is recorded at the registry (visible via RDAP) and then gradually picked up by resolvers worldwide as caches expire — so for a while, the old and new nameservers can both be in play.

This checker compares the registry delegation with the live nameservers resolvers return, and against your target set if you provide one, so you know exactly where the migration stands. Lowering TTLs beforehand and keeping both zones in sync during the switch avoids downtime.

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HostCloud.in  ·  Pune, India  ·  Serving 34,987+ Websites Since 2020

FREQUENTLY ASKED QUESTIONS

Got Questions? We Have Answers.

What does this migration checker do?

It compares your domain's registry-delegated nameservers (from RDAP) with the nameservers resolvers currently return (from DNS), and against a target set you provide, to show whether a migration has propagated.

What is the difference between registry and live nameservers?

Registry delegation is what your registrar has recorded; live nameservers are what resolvers actually serve. During a change they can differ until caches update.

How long does a nameserver change take?

Typically a few hours, but up to 48 hours because nameserver (NS) delegation changes at the registry level and caches expire gradually.

How do I avoid downtime during a migration?

Recreate all records at the new host first, lower TTLs beforehand, keep both zones in sync during the switch, and only remove the old zone once propagation completes.

Why does registry data sometimes show nothing?

Some ccTLDs do not publish RDAP, so registry delegation is unavailable. The tool then compares live nameservers only.

Is the check live?

Yes. It queries RDAP and DNS-over-HTTPS in real time — no cached data.