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: 64.0.0.0/5
Addresses: 134217728 (2²⁷)
First IP: 64.0.0.0 (0.0.0.64.in-addr.arpa)
Last IP: 71.255.255.255 (255.255.255.71.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

64.0.0.0/8
63.0.0.0/8
65.0.0.0/8
64.0.0.0/4
64.0.0.0/32
71.255.255.255/32

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