IPv6 subnet calculator

IPv6 CIDR range for a0::/11

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 a0::/11

The prefix identifies a network with 117 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

a0::/11

Network mask

ffe0::

Prefix length

/11

Host bits

117

First address

a0::

Last address

bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

166153499473114484112975882535043072

Total addresses (human readable)

2^117 addresses (166,153,499,473,114,484,112,975,882,535,043,072; about 166.15 decillion)

How this range is calculated

  1. 1The /11 prefix keeps the first 11 network bits fixed.
  2. 2Setting all 117 host bits to zero produces a0::.
  3. 3Setting those host bits to one produces bf: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

00a0:0000:0000:0000:0000:0000:0000:0000

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