Switching to Cloudflare DNS solves archive.today problems? That's strange. archive.today is known for having problems with Cloudflare DNS[1]. Switching to Google DNS should solve it. (This isn't because of a bug in Cloudflare DNS, but rather that archive.today dislikes that Cloudflare DNS doesn't support EDNS.)

Disclosure: I work at Google, but not on the DNS team.

[1] https://news.ycombinator.com/item?id=39925822

It’s not. They’ve blocked some countries entirely.

Yeah here in Finland the archive site seems to come and go on a monthly basis.

It's always DNS!