IPv6 subnet calculator

IPv6 CIDR range for fd00:aaaa::/46

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:aaaa::/46

The prefix identifies a network with 82 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

fd00:aaaa::/46

Network mask

ffff:ffff:fffc::

Prefix length

/46

Host bits

82

First address

fd00:aaaa::

Last address

fd00:aaaa:3:ffff:ffff:ffff:ffff:ffff

Total addresses

4835703278458516698824704

Total addresses (human readable)

2^82 addresses (4,835,703,278,458,516,698,824,704; about 4.83 septillion)

How this range is calculated

  1. 1The /46 prefix keeps the first 46 network bits fixed.
  2. 2Setting all 82 host bits to zero produces fd00:aaaa::.
  3. 3Setting those host bits to one produces fd00:aaaa:3: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:aaaa:0000:0000:0000:0000:0000:0000

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