<Tr> <Td> </Td> <Td_colspan="2"> 48 bits </Td> <Td> 16 bits </Td> <Td> 64 bits </Td> </Tr> <Tr> <Td> fd00:: / 8 </Td> <Td> fd </Td> <Td> xx: xxxx: xxxx </Td> <Td> yyyy </Td> <Td> 18 446 744 073 709 551 616 </Td> </Tr> <Table> <Tr> <Th> Prefix / L </Th> <Th> Global ID (random) </Th> <Th> Subnet ID </Th> <Th> Interface ID </Th> <Th> Address </Th> <Th> Subnet </Th> </Tr> <Tr> <Td> fd </Td> <Td> xx: xxxx: xxxx </Td> <Td> yyyy </Td> <Td> zzzz: zzzz: zzzz: zzzz </Td> <Td> fdxx: xxxx: xxxx: yyyy: zzzz: zzzz: zzzz: zzzz </Td> <Td> fdxx: xxxx: xxxx: yyyy:: / 64 </Td> </Tr> <Tr> <Td> fd </Td> <Td> 12: 3456: 789a </Td> <Td> 0001 </Td> <Td> 0000: 0000: 0000: 0001 </Td> <Td> fd12: 3456: 789a: 1:: 1 </Td> <Td> fd12: 3456: 789a: 1:: / 64 </Td> </Tr> </Table> <Tr> <Th> Prefix / L </Th> <Th> Global ID (random) </Th> <Th> Subnet ID </Th> <Th> Interface ID </Th> <Th> Address </Th> <Th> Subnet </Th> </Tr>

When can rfc 1918 addresses be routed on the internet