Out of curiosity, do you use Cloudflare DNS? Cloudflare doesn't support EDNS IP location (ostensibly for privacy), which Archive.today uses for geolocation-based multicast resolution.
Archive.today's maintainer decided they didn't want to deal with it, so they intentionally return incorrect DNS results to Cloudflare IPs. Cloudflare's CEO has stated they could just detect and override it, but that would be essentially MITMing DNS, which felt like an overreach: https://news.ycombinator.com/item?id=19828702
Interestingly, only my landline broadband connection blocks them (Aussie Broadband), not my mobile provider (Telstra, Optus)!
EDIT: contacted Aussie since it looks like they've forgotten to unblock it.
EDIT: Not related to blocking - turns out archive.today returns invalid IP when queries by Cloudflare DNS resolvers (which I use): https://en.wikipedia.org/wiki/EDNS_Client_Subnet#Controversy...