IPv6 subnet calculator

IPv6 CIDR range for fe80::/10

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 fe80::/10

The prefix identifies a network with 118 host bits. Every address from the first address through the last address belongs to this range.

CIDR prefix

fe80::/10

Network mask

ffc0::

Prefix length

/10

Host bits

118

First address

fe80::

Last address

febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Total addresses

332306998946228968225951765070086144

Total addresses (human readable)

2^118 addresses (332,306,998,946,228,968,225,951,765,070,086,144; about 332.3 decillion)

How this range is calculated

  1. 1The /10 prefix keeps the first 10 network bits fixed.
  2. 2Setting all 118 host bits to zero produces fe80::.
  3. 3Setting those host bits to one produces febf: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

fe80:0000:0000:0000:0000:0000:0000:0000

About this IPv6 prefix

IPv6 link-local range: fe80::/10

Every IPv6-enabled interface can use a link-local address from this range. These addresses work only on the local network link.

Recent network calculations

Recent IPv6 CIDR Ranges

Open recent IPv6 prefixes to inspect their normalized range, mask, and address capacity.

Learn how IPv6 CIDR notation and subnet ranges work