IPv6 subnet calculator

IPv6 CIDR range for 2001:16b8:6447:dd00::/115

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 2001:16b8:6447:dd00::/115

The prefix identifies a network with 13 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

2001:16b8:6447:dd00::/115

Network mask

ffff:ffff:ffff:ffff:ffff:ffff:ffff:e000

Prefix length

/115

Host bits

13

First address

2001:16b8:6447:dd00::

Last address

2001:16b8:6447:dd00::1fff

Total addresses

8192

Total addresses (human readable)

2^13 addresses (8,192; about 8.19 thousand)

How this range is calculated

  1. 1The /115 prefix keeps the first 115 network bits fixed.
  2. 2Setting all 13 host bits to zero produces 2001:16b8:6447:dd00::.
  3. 3Setting those host bits to one produces 2001:16b8:6447:dd00::1fff.

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

2001:16b8:6447:dd00:0000:0000:0000:0000

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