IPv6 subnet calculator

IPv6 CIDR range for 2600:70ff:b1ad:a08::/62

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 2600:70ff:b1ad:a08::/62

The prefix identifies a network with 66 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

2600:70ff:b1ad:a08::/62

Network mask

ffff:ffff:ffff:fffc::

Prefix length

/62

Host bits

66

First address

2600:70ff:b1ad:a08::

Last address

2600:70ff:b1ad:a0b:ffff:ffff:ffff:ffff

Total addresses

73786976294838206464

Total addresses (human readable)

2^66 addresses (73,786,976,294,838,206,464; about 73.78 quintillion)

How this range is calculated

  1. 1The /62 prefix keeps the first 62 network bits fixed.
  2. 2Setting all 66 host bits to zero produces 2600:70ff:b1ad:a08::.
  3. 3Setting those host bits to one produces 2600:70ff:b1ad:a0b: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

2600:70ff:b1ad:0a08:0000:0000:0000:0000

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