IPv6 subnet calculator

IPv6 CIDR range for 2600:1008:b170::/45

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 2600:1008:b170::/45

The prefix identifies a network with 83 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

2600:1008:b170::/45

Network mask

ffff:ffff:fff8::

Prefix length

/45

Host bits

83

First address

2600:1008:b170::

Last address

2600:1008:b177:ffff:ffff:ffff:ffff:ffff

Total addresses

9671406556917033397649408

Total addresses (human readable)

2^83 addresses (9,671,406,556,917,033,397,649,408; about 9.67 septillion)

How this range is calculated

  1. 1The /45 prefix keeps the first 45 network bits fixed.
  2. 2Setting all 83 host bits to zero produces 2600:1008:b170::.
  3. 3Setting those host bits to one produces 2600:1008:b177: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

2600:1008:b170:0000:0000:0000:0000:0000

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