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: 191.0.2.40/30
Addresses: 4 (2²)
First IP: 191.0.2.40 (40.2.0.191.in-addr.arpa)
Last IP: 191.0.2.43 (43.2.0.191.in-addr.arpa)

/8 Operated By: LACNIC

Related Networks

191.0.0.0/8
190.0.0.0/8
192.0.0.0/8
191.0.2.40/29
191.0.2.40/32
191.0.2.43/32

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