Network Basics: IPv6 Address Simplified Notation

When working with IPv6 address, it can take a lot to write your addresses — after all, they are 128 bits long. To make life simpler, here are some rules you can use to condense this notation:



  • Leading zeros in the address are optional. So, for an address block, 0A45 would be equal to A45, and 0000 would be equal to 0.



  • Multiple fields of zeros can be expressed as ::, but this can be done only once per address.



  • An unknown or unspecified address, even in IPv4, is typed as all zeros; as such, it can be represented in IPv6 as ::.




Most addresses that you write can likely be compressed in some fashion. The following table shows some examples of this type of compression.





























IPv6 Address Reduction
IPv6 AddressSimplified Notation
FF01:0000:0000:0000:0000:0000:0000:0001FF01::1
2031:0000:130F:0000:0000:09C0:876A:130B2031:0:130F::9C0:876A:130B
0000:0000:0000:0000:0000:0000:0000:0001::1
FE80:0000:0000:5EFE:0192.0168.0001.0123FE80::5EFE:192.168.1.123
FE80: 0000:0000:0000:1585:4868:495F:D521FE80::1585:4868:495F:D521



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Source:http://www.dummies.com/how-to/content/network-basics-ipv6-address-simplified-notation.html

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