IPv6 subnet calculator

IPv6 CIDR range for 240e:380::/27

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 240e:380::/27

The prefix identifies a network with 101 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

240e:380::/27

Network mask

ffff:ffe0::

Prefix length

/27

Host bits

101

First address

240e:380::

Last address

240e:39f:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

2535301200456458802993406410752

Total addresses (human readable)

2^101 addresses (2,535,301,200,456,458,802,993,406,410,752; about 2.53 nonillion)

How this range is calculated

  1. 1The /27 prefix keeps the first 27 network bits fixed.
  2. 2Setting all 101 host bits to zero produces 240e:380::.
  3. 3Setting those host bits to one produces 240e:39f: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

240e:0380:0000:0000:0000:0000:0000:0000

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