There is one other one that you missed for IPv6. ULA addresses are unique local addresses that are not automatically assigned and are assigned by the administra

There is one other one that you missed for IPv6. ULA addresses are unique local addresses that are not automatically assigned and are assigned by the administrator. They can be routed, but not on the public internet (only on your internal network (in an office, in multiple offices, datacenter, etc)). Those are not just for automatic peer-to-peer they are for assigning addresses on your network that can stay the same no matter if you change ISP's and they hand out a new /64 prefix to your network...