The following:
IPv4 - internal IP, with NAT and 10-ports allowance.
IPv6 - external IP with a /80 IPv6 subnet.
In order to provide the best possible price, address allocation and ports usage was optimized for our FocusLXC offer - that's why no fixed IPv4 or IPv6 /64 exists. If you need one of those, take a look at our MultiVPS or VPS Outlet offers.