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: 100.255.255.244/30
Addresses: 4 (2²)
First IP: 100.255.255.244 (244.255.255.100.in-addr.arpa)
Last IP: 100.255.255.247 (247.255.255.100.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

100.0.0.0/8
99.0.0.0/8
101.0.0.0/8
100.255.255.240/29
100.255.255.244/32
100.255.255.247/32

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