Hexadecimal, in groups of sixteen bits.
E.g. 2000:0AD5:1F33:0000:0000:0000:013F:B043
There are a few rules which make it easier:
- A leading zero can be dropped.
So above addres becomes 2000:AD5:1F33:0:0:0:13F:B043
- Fields of four zero's may be left out, but only once in each address.
So you can also write: 2000:AD5:1F33::13F:B043
A few more usefull bits of information:
- The loopback-address (IPv4's 127.0.0.1) is all zero's with the last bit being one, or '::1'
- Subnetmasks are only written in the slash-notation.
E.g. 2000:AD5:1F33::13F:B043/64
- Broadcast addresses do no longer exists in IPv6 and have been replaced by the 'all-nodes' multicast group. So the last address in a subnet is useable.
E.g. 2000:0AD5:1F33:0000:0000:0000:013F:B043
There are a few rules which make it easier:
- A leading zero can be dropped.
So above addres becomes 2000:AD5:1F33:0:0:0:13F:B043
- Fields of four zero's may be left out, but only once in each address.
So you can also write: 2000:AD5:1F33::13F:B043
A few more usefull bits of information:
- The loopback-address (IPv4's 127.0.0.1) is all zero's with the last bit being one, or '::1'
- Subnetmasks are only written in the slash-notation.
E.g. 2000:AD5:1F33::13F:B043/64
- Broadcast addresses do no longer exists in IPv6 and have been replaced by the 'all-nodes' multicast group. So the last address in a subnet is useable.
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