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: 232.128.0.90/31
Addresses: 2 (2¹)
First IP: 232.128.0.90 (90.0.128.232.in-addr.arpa)
Last IP: 232.128.0.91 (91.0.128.232.in-addr.arpa)

/8 Operated By: Multicast

Related Networks

232.0.0.0/8
231.0.0.0/8
233.0.0.0/8
232.128.0.88/30
232.128.0.90/32
232.128.0.91/32

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