DNS Propagation Checker

How long does DNS propagation take?

Propagation depends on the TTL of the old record. If the previous TTL was 3600 (1 hour), resolvers cache the old value for up to 1 hour before re-querying. In practice, most resolvers update within minutes to a few hours after the TTL expires. Changes can take up to 48 hours globally.

Why do different resolvers show different values?

Each resolver caches records independently until the TTL expires. If a resolver cached the old record 30 minutes ago and the TTL is 3600, it won't re-query for another 30 minutes. This is normal during propagation.

How can I speed up DNS propagation?

Lower your TTL to 300 (5 minutes) at least 24 hours before making the change. After the change, resolvers re-query quickly. Once propagation is complete, raise the TTL back (e.g. 3600 or 86400) for better caching performance.

The checker shows my old IP — should I wait or act?

If you changed the record recently, wait for the old TTL to expire. If it's been over 48 hours and some resolvers still show old values, re-verify your DNS changes at the authoritative nameserver. The issue may be a misconfigured record rather than slow propagation.