super interesting. the early days of military networks always fascinate me, especially the legacy holdovers like .arpa
Between resolver.arpa, ipv4only.arpa, and the fact that your email won't be delivered to anywhere you actually care about without in-addr.arpa I'm not sure I'd call it legacy.
Between resolver.arpa, ipv4only.arpa, and the fact that your email won't be delivered to anywhere you actually care about without in-addr.arpa I'm not sure I'd call it legacy.