IPv6 notation tool

Expand IPv6 address 2a03:3c00:a002:166::100b

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 2a03:3c00:a002:166::100b

Expanded IPv6 address

2a03:3c00:a002:0166:0000:0000:0000:100b

Compressed IPv6

2a03:3c00:a002:166::100b

Expanded IPv6

2a03:3c00:a002:0166:0000:0000:0000:100b

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.

0010101000000011 0011110000000000 1010000000000010 0000000101100110 0000000000000000 0000000000000000 0000000000000000 0001000000001011

Compress this IPv6 address

Recent notation conversions

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