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Free tool

Has the DNS change gone live?

The same question to six public resolvers and to the zone's own nameserver. If they disagree, a cached answer is still out there; the TTL column says for how long.

What this checks

Why resolvers disagree for a while

When you change a record, your nameserver answers with the new value at once. Every resolver that cached the old value keeps serving it until its copy expires, which takes up to the old TTL. "Propagation" is just that wait. The authoritative row is the truth; the others show who has caught up. Lower the TTL a day before a planned change and the wait shrinks to minutes.

Related tools

More in this set

  • DNS lookup Any record type of any name, with TTLs.
  • Nameserver check Do all nameservers answer, authoritatively, with the same serial?
  • DNSSEC check DS at the parent, DNSKEY in the zone, and whether they match.
  • Reverse DNS check PTR record of an address and whether it confirms forward.
  • Domain info Registrar, expiry date, status and nameservers from the registry.

All tools Glossary

Domains and DNS

Domains with DNS hosting included

Register or transfer .lu, .eu, .be, .com and more; the DNS editor, DNSSEC and the records these tools check are in the client area.

See domains