IPv6 subnet calculator

IPv6 CIDR range for fd00::/14

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 fd00::/14

The prefix identifies a network with 114 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

fd00::/14

Network mask

fffc::

Prefix length

/14

Host bits

114

First address

fd00::

Last address

fd03:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

20769187434139310514121985316880384

Total addresses (human readable)

2^114 addresses (20,769,187,434,139,310,514,121,985,316,880,384; about 20.76 decillion)

How this range is calculated

  1. 1The /14 prefix keeps the first 14 network bits fixed.
  2. 2Setting all 114 host bits to zero produces fd00::.
  3. 3Setting those host bits to one produces fd03: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

fd00:0000:0000:0000:0000:0000:0000:0000

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