> Since the internet was at the start not obviously going to be used, the minimum allocation size for an address block was a /8 at the start, later on we got “c

> Since the internet was at the start not obviously going to be used, the minimum allocation size for an address block was a /8 at the start, later on we got “classful” allocations where a /16 would be assigned instead (this is why you often see /16s assigned to universities or institutions of similar ages), Classful allocation had /8s, /16s, and /24s depending on the numeric prefix (0-127 were /8, 128-191 were /16, and 192-223 were /24). https://en.wikipedia.org/wiki/Classful_network#Classful_addressing_definition https://en.wikipedia.org/wiki/Classful_network#Classful_addr...