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: 130.0.4.78/31
Addresses: 2 (2¹)
First IP: 130.0.4.78 (78.4.0.130.in-addr.arpa)
Last IP: 130.0.4.79 (79.4.0.130.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

130.0.0.0/8
129.0.0.0/8
131.0.0.0/8
130.0.4.76/30
130.0.4.78/32
130.0.4.79/32

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