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Has your DNS change gone live?

Look up any record on DNS servers around the world and see which ones already show the new value.

  • 18 public resolvers

    Google, Cloudflare, Quad9, OpenDNS and resolvers in Europe and Asia.

  • Compared with the source

    Every answer is checked against your domain's own nameservers, not just against each other.

  • Why it takes time

    Resolvers keep the old answer until its TTL expires. Lower the TTL a day before you change records.

How it works

How propagation is checked

After you change a DNS record, resolvers keep serving the old value until their cached copy expires. The checker asks public resolvers from Google, Cloudflare, Quad9 and other providers for the record and compares each answer with the domain's own nameservers.

Authoritative answer

The domain's own (authoritative) nameservers hold the current value. Every resolver's answer is compared with theirs, so a match means that resolver already sees your change.

Record types

A, AAAA, CNAME, MX, NS, TXT, CAA, SOA and PTR. Use MX and TXT to check email setup, and NS after moving a domain to new nameservers.

Why answers differ

Each resolver caches a record for its TTL. Until that time runs out, some resolvers return the old value and some the new one. Lowering the TTL a day before a change makes the switch faster.

Safe by design

Only fixed public resolvers and the domain's own public nameservers are queried, so the checker cannot be used to probe private networks.

Common questions

How long does DNS propagation take?

As long as the old record's TTL, which is often between a few minutes and 24 hours. Nameserver changes can take longer because the TTL at the registry is usually higher.

All resolvers show the old value. What now?

First check the authoritative answer. If it still shows the old value, the change was not saved at your DNS provider. If it shows the new one, the resolvers are still caching and will update.

What does "no authoritative answer" mean?

The domain's nameservers did not return that record. Either it does not exist, or the nameservers listed at the registrar are not the ones hosting your zone.

Can I check email records?

Yes. Choose MX for mail servers, and TXT for SPF, DKIM and DMARC records.