IPv6 notation tool

Expand IPv6 address 21f:dd73:7cdb:773b:a924:7ec0:800b:221e

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 21f:dd73:7cdb:773b:a924:7ec0:800b:221e

Expanded IPv6 address

021f:dd73:7cdb:773b:a924:7ec0:800b:221e

Compressed IPv6

21f:dd73:7cdb:773b:a924:7ec0:800b:221e

Expanded IPv6

021f:dd73:7cdb:773b:a924:7ec0:800b:221e

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.

0000001000011111 1101110101110011 0111110011011011 0111011100111011 1010100100100100 0111111011000000 1000000000001011 0010001000011110

Compress this IPv6 address

Recent notation conversions

Open recent IPv6 addresses to inspect their complete eight-group and binary forms.