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: 22.128.16.0/21
Addresses: 2048 (2¹¹)
First IP: 22.128.16.0 (0.16.128.22.in-addr.arpa)
Last IP: 22.128.23.255 (255.23.128.22.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
22.128.16.0/20
22.128.16.0/32
22.128.23.255/32

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