Expansion result
Full IPv6 notation for ::
Expanded IPv6 address
0000:0000:0000:0000:0000:0000:0000:0000
Compressed IPv6
::
Expanded IPv6
0000:0000:0000:0000:0000:0000:0000:0000
IPv6 groups
8 groups of 4 hexadecimal digits
Address size
128 bits
IPv6 notation tool
Expand IPv6 address ::
Write any valid IPv6 address in its complete eight-group form for subnetting, binary analysis, logs, and documentation.
Example: 2001:db8::1
Expansion rules
How IPv6 expansion works
- 1An IPv6 address always has eight 16-bit hexadecimal groups.
- 2Each visible group is left-padded with zeroes until it contains four digits.
- 3If :: appears, it is replaced with the number of 0000 groups needed to reach eight groups.
Binary representation
128 bits, grouped for inspection
Each block below represents one 16-bit IPv6 group. This form is useful when comparing prefix bits or troubleshooting subnet boundaries.
0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000About this IPv6 address
Unspecified IPv6 address: ::
The unspecified address represents the absence of an IPv6 address. It is used during initialization and is not a routable destination.
Recent notation conversions
Recent IPv6 Expansions
Open recent IPv6 addresses to inspect their complete eight-group and binary forms.