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: 102.0.3.129/32
Addresses: 1 (2⁰)
First IP: 102.0.3.129 (129.3.0.102.in-addr.arpa)
Last IP: 102.0.3.129 (129.3.0.102.in-addr.arpa)

/8 Operated By: AFRINIC

Related Networks

102.0.0.0/8
101.0.0.0/8
103.0.0.0/8
102.0.3.128/31

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