I have been managing a network and it appears something has recently begun blocking access to cloudflare dns servers 184.108.40.206 and family. The https://220.127.116.11 url is working but dns queries fail with timeout.
The issue seems to be limited to the windows based desktop computers, as i can perform queries on the linux based routers.
Dns queries to 18.104.22.168 on the other hand work fine, so it seems something is specifically blocking 22.214.171.124 / 126.96.36.199 / 188.8.131.52 / 184.108.40.206 on port 53
It seems unlikely that this is actually a cloudflare issue but since it seems to be a very specific issue i was hoping somebody might have a hint or other helpful information.