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: 73.0.3.203/32
Addresses: 1 (2⁰)
First IP: 73.0.3.203 (203.3.0.73.in-addr.arpa)
Last IP: 73.0.3.203 (203.3.0.73.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

73.0.0.0/8
72.0.0.0/8
74.0.0.0/8
73.0.3.202/31

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