DNS Propagation Checker — Check DNS Changes Globally Free

DNS propagation is the time it takes for DNS changes to spread across the world's DNS servers. When you change a DNS record, it can take anywhere from a few minutes to 48 hours for all resolvers globally to see the new value, depending on the TTL.

Each DNS resolver caches records for the duration of their TTL (Time To Live). Until the cache expires, the old record is served. Lower TTL values speed up propagation; higher values slow it down.

Enter your domain and select the record type you changed (usually A or CNAME). If all resolvers return the new value, propagation is complete. If some show the old value, it is still in progress.

Lower your TTL value to 300 seconds (5 minutes) at least 48 hours before making changes. After the change, resolvers will re-query much sooner. You can raise the TTL back after the change has propagated.

DNS propagation typically completes within 1—2 hours for most resolvers if your TTL is low. The maximum theoretical time is the TTL of the old record — common TTLs of 86400 (24 hours) can mean up to 48 hours for full global propagation.

Resolvers cache DNS answers according to the TTL value. Until a resolver's cached copy expires, it will continue returning the old record even after you've made changes.