This document redesignates 240/4, the region of the IPv4 address space historically known as "Experimental," "Future Use," or "Class E" address space, so that this space is no longer reserved. It asks implementers to make addresses in this range fully usable for unicast use on the Internet.| IETF Datatracker
A new chapter in the long saga of the 240/4 block is being written. If you want more and cheaper IPv4, maybe you should help| www.theregister.com