What is DNS propagation?

The delay while resolvers around the world pick up a DNS change. Cached answers persist until the record’s TTL expires, so different resolvers can disagree for a while.

How long does propagation take?

Usually minutes to a couple of hours, bounded by the record’s TTL. Lowering the TTL before a planned change shortens the window.

DNS Propagation Checker

Check whether a DNS change has propagated by resolving a domain across public resolvers.

About this tool

After a DNS change, different resolvers update at different times. We resolve your domain against Google, Cloudflare, Quad9, and OpenDNS so you can see whether they agree yet.

Frequently asked questions

What is DNS propagation?: The delay while resolvers around the world pick up a DNS change. Cached answers persist until the record’s TTL expires, so different resolvers can disagree for a while.
Which resolvers do you check?: Major public resolvers — Google, Cloudflare, Quad9, and OpenDNS — so you can see whether they have converged on the new value.
How long does propagation take?: Usually minutes to a couple of hours, bounded by the record’s TTL. Lowering the TTL before a planned change shortens the window.