Check DNS propagation across 50+ worldwide servers. Verify DNS changes, monitor record updates, and troubleshoot issues.
ReviewMyDNS is a free DNS propagation checker that queries 50+ global DNS servers to verify your DNS records. Check A, AAAA, MX, CNAME, TXT, NS, and SOA records instantly.
When you update a DNS record — pointing your domain to a new server, switching email providers, or adding a TXT record for email authentication — that change must travel from your authoritative nameserver to recursive resolvers worldwide before every user sees the new value. This process is called DNS propagation.
Propagation isn't instant because DNS resolvers cache records according to the TTL (Time to Live) value set on each record. A TTL of 3600 means a resolver can serve its cached copy for up to one hour before re-querying. If you're changing a record with a 24-hour TTL, some resolvers may serve stale data for up to a full day. The fix: lower your TTL to 300 seconds at least 48 hours before any planned DNS change.
Enter your domain name, select the record type you changed (A, AAAA, CNAME, MX, TXT, NS, or SOA), and click Check. The tool simultaneously queries 50+ DNS servers distributed across North America, Europe, Asia-Pacific, South America, and Africa and returns each server's current answer. Green results mean the new record is live at that location. Inconsistent results mean propagation is still in progress.
Different resolvers refresh their caches at different times. A resolver in Tokyo may have already picked up your new record while one in São Paulo is still serving the old value — both are behaving correctly according to DNS standards. This is normal during the TTL window and resolves itself once cached copies expire. If propagation looks complete globally but users in a specific region still see the old value, their ISP's resolver may have a long TTL override or a resolver that aggressively caches.