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: 233.0.0.66/31
Addresses: 2 (2¹)
First IP: 233.0.0.66 (66.0.0.233.in-addr.arpa)
Last IP: 233.0.0.67 (67.0.0.233.in-addr.arpa)

/8 Operated By: Multicast

Related Networks

233.0.0.0/8
232.0.0.0/8
234.0.0.0/8
233.0.0.64/30
233.0.0.66/32
233.0.0.67/32

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