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: 55.255.255.142/31
Addresses: 2 (2¹)
First IP: 55.255.255.142 (142.255.255.55.in-addr.arpa)
Last IP: 55.255.255.143 (143.255.255.55.in-addr.arpa)

/8 Operated By: Department of Defense Network Information Center

Related Networks

55.0.0.0/8
54.0.0.0/8
56.0.0.0/8
55.255.255.140/30
55.255.255.142/32
55.255.255.143/32

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