What the DNS propagation board does
After you change a DNS record you want to know if it has spread. This board asks the same record of public resolvers such as Cloudflare, Google, Quad9, OpenDNS and Türk Telekom from this host, and shows the majority versus drift.
It is not a global PoP network or a 50-country probe. 1.1.1.1 and 8.8.8.8 are anycast. Still, you quickly spot resolvers that still hold the old IP before TTL expires.
Examples
- A propagation
example.com · AMost return 203.0.113.10; one still has 198.51.100.2 → wait for TTL.- MX change
example.com · MXCheck that the new mx1 preference matches everywhere.- PTR
8.8.8.8 · PTRType an IP, not a hostname.
How to read the board
One green majority group means propagation looks done. Two IP groups mean some caches are stale. NXDOMAIN means that resolver does not know the name. Timeout means UDP/53 filtered or silent — not the same as “not propagated”.
Missing NS/SOA suggests the zone is not published. Missing AAAA is usually a warning. Add your own resolver IP as a custom server to compare it on the same board.
Examples
- Fully spread
12/12 same AThe change is visible; browser cache is separate.- Partial
9 new · 3 oldWait for TTL or flush the stale resolver.