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: 151.0.1.12/31
Addresses: 2 (2¹)
First IP: 151.0.1.12 (12.1.0.151.in-addr.arpa)
Last IP: 151.0.1.13 (13.1.0.151.in-addr.arpa)

/8 Operated By: RIPE NCC

Related Networks

151.0.0.0/8
150.0.0.0/8
152.0.0.0/8
151.0.1.12/30
151.0.1.12/32
151.0.1.13/32

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