How to Troubleshoot DNS Propagation
Diagnose stale DNS cache and propagation delays using DNS Lookup and DNS Propagation tools.
Updated 2026-06-01
Confirm authoritative DNS
Run DNS Lookup against your domain to see what the authoritative zone should return.
If authoritative data is wrong, fix the zone at your DNS provider before checking propagation.
Compare resolvers
Use DNS Propagation to query multiple public resolvers. Mismatched answers usually mean TTL cache has not expired.
Lower TTL before planned migrations (e.g. 300 seconds) to speed up global convergence.
FAQ
Propagation depends on the previous TTL. With a 1-hour TTL, some resolvers may serve old records for up to an hour after you change the zone.