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: 1.255.255.100/30
Addresses: 4 (2²)
First IP: 1.255.255.100 (100.255.255.1.in-addr.arpa)
Last IP: 1.255.255.103 (103.255.255.1.in-addr.arpa)

/8 Operated By: APNIC

Related Networks

1.0.0.0/8
0.0.0.0/8
2.0.0.0/8
1.255.255.96/29
1.255.255.100/32
1.255.255.103/32

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