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: 212.0.0.42/31
Addresses: 2 (2¹)
First IP: 212.0.0.42 (42.0.0.212.in-addr.arpa)
Last IP: 212.0.0.43 (43.0.0.212.in-addr.arpa)

/8 Operated By: RIPE NCC

Related Networks

212.0.0.0/8
211.0.0.0/8
213.0.0.0/8
212.0.0.40/30
212.0.0.42/32
212.0.0.43/32

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