I think it's a DNS level block. I've been using NextDNS (free plan) and one side effect (besides auto ad block) is that it doesn't have those blocks. Highly recommend - there are alternative services as well, just saw NextDNS recommended here.

Alternative: https://archive.ph/2025.12.21-050644/https://annas-archive.l...

Someone compiled a list of blocked domains (by probing different DNS servers):

https://cuiiliste.de/

This is also how, for example, RT is blocked in Germany.