There are quite a few IP addresses if the corporates share
If you want to free up addresses, get the big old corporates who hopped on in the early 90s to return some addresses.
There are a whole swath of /8 blocks that each contain 16,777,216 IPs.
Get Apple, Ford, GE, Prudential, UPS to return a few as good corporate citizens.
Maybe get the US Department of Defence (which has the most addresses of any entity by a massive margin) to be a little more sharing.
https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_address_blocks
Biting the hand that feeds IT
