IPv6 subnet calculator

IPv6 CIDR range for aaa0::/12

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 aaa0::/12

The prefix identifies a network with 116 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

aaa0::/12

Network mask

fff0::

Prefix length

/12

Host bits

116

First address

aaa0::

Last address

aaaf:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

83076749736557242056487941267521536

Total addresses (human readable)

2^116 addresses (83,076,749,736,557,242,056,487,941,267,521,536; about 83.07 decillion)

How this range is calculated

  1. 1The /12 prefix keeps the first 12 network bits fixed.
  2. 2Setting all 116 host bits to zero produces aaa0::.
  3. 3Setting those host bits to one produces aaaf:ffff: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

aaa0:0000:0000:0000:0000:0000:0000:0000

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