None of the links ever work for me, but it seems that I can access it anywhere but my home network.
Most ISP's just use DNS-filtering to block it, so getting around it is as easy as changing your DNS settings.
My isp's nameserver responds with "REFUSED". Quad 9 works just fine:
$ nslookup archive.is 125.253.59.220
Server: 125.253.59.220
Address: 125.253.59.220#53
** server can't find archive.is: REFUSED
$ nslookup archive.is 9.9.9.9
Server: 9.9.9.9
Address: 9.9.9.9#53
Non-authoritative answer:
Name: archive.is
Address: 51.38.113.224