High-order bits of IPv6 address types.
Address Type igh-Order Bits (binary) High-Order Bits (Hex)
Unspecified 00...0 ::/128
Loopback 00...1 ::1/128
Multicast 11111111 FF00::/8
Link-Local Unicast 1111111010 FF80::/10
Site-Local Unicast (Deprecated) 1111111011 FFC0::/10
Global Unicast (Currently allocated) 001 2xxx::/4 or 3xxx::/4
Reserved (Future global unicast allocations) Everything else