DNS Propagation Checker
Check a record against major public resolvers to see whether your change has propagated.
Frequently asked questions
What does DNS propagation mean?
When you change a DNS record, resolvers around the internet keep the old value cached until its TTL expires. Propagation is the period during which different resolvers may return different answers.
Which resolvers do you check?
A set of major public resolvers including Cloudflare, Google, Quad9, OpenDNS, AdGuard, Level3 and Verisign. These are anycast resolvers, not per-country probes.
Why do some resolvers disagree?
A resolver still serving a cached copy of the old record will differ from one that has fetched the new value. Once every TTL expires they converge.
Want these records watched around the clock?
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