Comment by 1vuio0pswjnm7

ECS is popular with third party DNS providers with open resolvers, like Google, but not all software that sends DNS queries sends large DNS packets with EDNS extensions and some www users avoid open resolvers

One of the things that I noticed about NextDNS when they announced their service on HN is that like the other public caches, they too sent ECS, but they claimed they could "anonymise" it