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Re:1.1.1.1 for Families by tomklein on Thursday October 28, 2021 @12:39PM (#29028029)
I coded a GeoDNS for a couple of my sites and Cloudflare‘s IPs are always geolocated to the nearest datacenters and works great in a GeoDNS setting.

Also, what about DNS resolvers that don’t support EDNS at all?

Re:1.1.1.1 for Families by tick_tock_tick on Thursday October 28, 2021 @01:45PM (#29028862)
The check archive.is uses to return garbage is specifically for cloudflare's IPs all other non-EDNS works fine. You can dig to there authoritative DNS server yourself to see.