IPv6 subnet calculator

IPv6 CIDR range for 80::/9

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 80::/9

The prefix identifies a network with 119 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

80::/9

Network mask

ff80::

Prefix length

/9

Host bits

119

First address

80::

Last address

ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

664613997892457936451903530140172288

Total addresses (human readable)

2^119 addresses (664,613,997,892,457,936,451,903,530,140,172,288; about 664.61 decillion)

How this range is calculated

  1. 1The /9 prefix keeps the first 9 network bits fixed.
  2. 2Setting all 119 host bits to zero produces 80::.
  3. 3Setting those host bits to one produces ff: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

0080:0000:0000:0000:0000:0000:0000:0000

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