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: 56.0.3.20/31
Addresses: 2 (2¹)
First IP: 56.0.3.20 (20.3.0.56.in-addr.arpa)
Last IP: 56.0.3.21 (21.3.0.56.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

56.0.0.0/8
55.0.0.0/8
57.0.0.0/8
56.0.3.20/30
56.0.3.20/32
56.0.3.21/32

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