IPv6 subnet calculator

IPv6 CIDR range for ::/22

Calculate the network address, final address, mask, and exact address capacity of any IPv6 CIDR prefix.

Example: 2606:4700::/32

Host bits are normalized to the network address before the range is calculated.

CIDR calculation

Network details for ::/22

The prefix identifies a network with 106 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

::/22

Network mask

ffff:fc00::

Prefix length

/22

Host bits

106

First address

::

Last address

0:3ff:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

81129638414606681695789005144064

Total addresses (human readable)

2^106 addresses (81,129,638,414,606,681,695,789,005,144,064; about 81.12 nonillion)

How this range is calculated

  1. 1The /22 prefix keeps the first 22 network bits fixed.
  2. 2Setting all 106 host bits to zero produces ::.
  3. 3Setting those host bits to one produces 0:3ff:ffff:ffff:ffff:ffff:ffff:ffff.

Network address

The normalized prefix base

CIDR notation describes a network, not a single host. If an address with host bits set is entered, this calculator normalizes it to the network base before calculating the range.

Expanded network address

0000:0000:0000:0000:0000:0000:0000:0000

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