https://cand.pglaf.org/germany/index.html
Gutenberg was blocked in Italy in early 2020. I don't know if this block still persists.
https://www.balcanicaucaso.org/eng/Areas/Italy/Project-Guten...
afaict, it resolves and loads fine here. Now on mobile tethering via the Iliad (.it) local operator. When I get home I'll also check it on broadband.
I wonder how your provider overrides it. Is it too much of a wet dream to think that some operators (behind the DNS) responded to the requests of the vacuously appointed low scum* with disdainful neglect? In terms of "If you really had any credential for existence but some forms of physical expression, we would say that you must be joking - before putting the proof of your vilty in the trash archival it deserves".
*May I remind that they appended the apex of Civilization, Project Gutenberg, to a list of a dozen pirate sites in their "operation". No, really, I cannot find words to label those lowest abysses.
I don't use the (ex) national provider (Telecom Italia / Tim) however. Crappy service aside, they're well known for jumping every time the government tells them to, and happily filter a lot of stuff.
- Gutenberg - Zlib - libgen
via o2 (not promoting them in any way)