DNS propagation
4 of 9 resolvers give a different answer github.com A
Large sites and CDNs hand out different addresses on purpose, by location or in rotation, so A/AAAA differences aren’t always a problem. Compare SOA serials to check whether a zone change has propagated.
| Resolver | Answer | |
|---|---|---|
| Cloudflare 3 ms · TTL 42s |
Match | 140.82.114.3 |
| Google 84 ms · TTL 60s |
Match | 140.82.114.3 |
| Quad9 249 ms · TTL 19s |
Differs | 140.82.112.4 |
| OpenDNS (Cisco) 94 ms · TTL 60s |
Match | 140.82.114.3 |
| AdGuard (unfiltered) 395 ms · TTL 60s |
Match | 140.82.114.3 |
| Control D 115 ms · TTL 22s |
Match | 140.82.114.3 |
| Mullvad 607 ms · TTL 42s |
Differs | 20.26.156.215 |
| DNS.SB 1283 ms · TTL 50s |
Differs | 140.82.112.4 |
| AliDNS 562 ms · TTL 1s |
Differs | 140.82.116.3 |