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: 228.0.8.20/31
Addresses: 2 (2¹)
First IP: 228.0.8.20 (20.8.0.228.in-addr.arpa)
Last IP: 228.0.8.21 (21.8.0.228.in-addr.arpa)

/8 Operated By: Multicast

Related Networks

228.0.0.0/8
227.0.0.0/8
229.0.0.0/8
228.0.8.20/30
228.0.8.20/32
228.0.8.21/32

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