DNS propagation is the time it takes for DNS changes (new records, updated IPs, name server changes) to spread across the internet. When you update a DNS record, it doesn't take effect everywhere instantly — different DNS servers around the world need time to refresh their caches.

Use this tool to verify DNS changes after migration, check if new records are live everywhere, troubleshoot mixed results across locations, and understand your domain's TTL (Time To Live) settings. Propagation typically takes 0-48 hours depending on TTL values.