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: 72.64.0.16/31
Addresses: 2 (2¹)
First IP: 72.64.0.16 (16.0.64.72.in-addr.arpa)
Last IP: 72.64.0.17 (17.0.64.72.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

72.0.0.0/8
71.0.0.0/8
73.0.0.0/8
72.64.0.16/30
72.64.0.16/32
72.64.0.17/32

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