represents the total 32-bit address space with the black region being those
addresses that cannot be used (224/4, 10/8, &c); the gray circle
represents the 3.7B addresses remaining.
The allocated space, currently 52.3% of the gray, is what the RIRs
work with and, in turn, delegate down to IIRs. The orange region represents the portion of the address space
which is assigned to the ISPs and individual networks. We haven’t measured the size or growth of
this or the ‘delegated’ address (not illustrated) regions yet; these will be
analyzed in the near future.