I have been using 2606:4700:4700::1111 and 2606:4700:4700::1001 for quite a while (several months) and they have been working well. However, starting yesterday they no longer work for me. Replacing them with the OpenDNS ones (2620:119:53::53 and 2620:119:35::35) works.
I’m not sure if it’s Cloudflare or my route to them. Am I the only one?
This is via Hurricane Electric’s network (more specifically, their ipv6 tunnel broker)
EDIT: The issue is at HE. Using a different tunnel broker with the same CF ipv6 dns works fine.