monolith.agency has address 104.28.8.19 monolith.agency has IPv6 address 2400:cb00:2048:1::681c:813 Notice that the IPv4 address is embedded in the last 32

monolith.agency has address 104.28.8.19 monolith.agency has IPv6 address 2400:cb00:2048:1::681c:813 Notice that the IPv4 address is embedded in the last 32 bits of the IPv6 address. I would assume that this allows both addresses to be generated from the same configuration, rather than trying to keep two copies in sync.