The utilization of 44/8: the reason I mapped IPv4 & IPv6May 15, 2021 In the early days, when the Internet was just beginning, back in 1981, radio amateurs were allocated, by what is now known as IANA, an IPv4 block for usage and experimentation by all members of this hobby, internationally. This block was 44.0.0.0/8, which is a huge amount of address space by today’s standards, but effectively the