DNS propagation is the time it takes for nameserver or DNS record changes to spread across all servers worldwide. Understanding it helps set expectations and troubleshoot connectivity issues.
How Long Does Propagation Take?
DNS changes typically propagate within 1β4 hours for most locations. Full global propagation can take up to 48 hours in rare cases. The speed depends on your record's TTL β lower TTL = faster propagation.
Why Does My Site Look Different on Different Devices?
During propagation, different DNS servers may cache different values. Someone in the US might see your new server while someone in Asia still sees the old one. This is normal and resolves once all caches expire.
Checking Propagation Status
Use whatsmydns.net to check DNS resolution from dozens of locations worldwide. Enter your domain and select the record type (A, MX, etc.) to see which servers have updated and which still show the old value.
Speeding Up Propagation
To speed up future changes, lower your record's TTL to 300 (5 minutes) at least 24 hours before you plan to make the change. After the change is complete and propagated, raise TTL back to 14400.