IPv4 Subnet Calculator

This calculator and tool allows you to type an IP address in and get information on a particular subnet. Enter an IP or range in CIDR notation.

Network: 22.128.12.66/31
Addresses: 2 (2¹)
First IP: 22.128.12.66 (66.12.128.22.in-addr.arpa)
Last IP: 22.128.12.67 (67.12.128.22.in-addr.arpa)

/8 Operated By: Defense Information Systems Agency

Related Networks

22.0.0.0/8
21.0.0.0/8
23.0.0.0/8
22.128.12.64/30
22.128.12.66/32
22.128.12.67/32

You can also use some of the other examples such as:

0.0.0.0/0
1.0.0.0/8
127.0.0.1
30.0.0.0/8
192.168.0.0/16