IPv6 notation tool

Expand IPv6 address fd81:2738:6a9d:0:da8:cacd:2347:3596

Write any valid IPv6 address in its complete eight-group form for subnetting, binary analysis, logs, and documentation.

Example: 2001:db8::1

Expansion result

Full IPv6 notation for fd81:2738:6a9d:0:da8:cacd:2347:3596

Expanded IPv6 address

fd81:2738:6a9d:0000:0da8:cacd:2347:3596

Compressed IPv6

fd81:2738:6a9d:0:da8:cacd:2347:3596

Expanded IPv6

fd81:2738:6a9d:0000:0da8:cacd:2347:3596

IPv6 groups

8 groups of 4 hexadecimal digits

Address size

128 bits

Expansion rules

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

Each block below represents one 16-bit IPv6 group. This form is useful when comparing prefix bits or troubleshooting subnet boundaries.

1111110110000001 0010011100111000 0110101010011101 0000000000000000 0000110110101000 1100101011001101 0010001101000111 0011010110010110

Compress this IPv6 address

Recent notation conversions

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