IPv4.1 is a thing, and has been supported in the Linux kernel for some years. It basically adds on a extra octet to IPv4, giving you 40 bits of address space ra

IPv4.1 is a thing, and has been supported in the Linux kernel for some years. It basically adds on a extra octet to IPv4, giving you 40 bits of address space rather than 32. AFAIK this hasn't and will probably never make it out of experimental status.