Still plenty of unused grandfathered class-A space, The companies sitting on it surely know it will rise in value.<p>When I last checked, each of these companies still owned an entire /8 (16,777,216 IPv4 addresses): GE, IBM, Alcatel-Lucent, Xerox, Apple, MIT, Ford. And HP owns two! (That's 9 out of the first 19, AFAICS.)