Subtract 588 million reserved IPs, as well as 2 from each subnet (0 and 255). There are also a lot of blocks that are publicly routable but see no use on the i

Subtract 588 million reserved IPs, as well as 2 from each subnet (0 and 255). There are also a lot of blocks that are publicly routable but see no use on the internet. If I were to build a rainbow table, I'd start with blocks assigned to ISPs, then throw in the results of publicly available distributed internet surveys, only then would I start the algorithmic address generation. Same story for IPv6. I really don't think it is a state actor level problem, but if it is it won't be for long.