Unless you are using a VPN/Wireguard/Proxy your ISP can simply look at the source address on the IP packets and do a reverse IP lookup to find out what site you

Unless you are using a VPN/Wireguard/Proxy your ISP can simply look at the source address on the IP packets and do a reverse IP lookup to find out what site you are accessing. Doesn't matter if you are using DoH, DNS over TLS, DNSCRYPT, etc.... At a conference I was talking to one of the OpenDNS engineers on the DoH project and when I asked "so how does DoH help snooping if people can just look at IP headers?" they conceded that it really doesn't help if someone is determined to snoop.