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: 188.64.0.0/21
Addresses: 2048 (2¹¹)
First IP: 188.64.0.0 (0.0.64.188.in-addr.arpa)
Last IP: 188.64.7.255 (255.7.64.188.in-addr.arpa)

/8 Operated By: RIPE NCC

Related Networks

188.0.0.0/8
187.0.0.0/8
189.0.0.0/8
188.64.0.0/20
188.64.0.0/32
188.64.7.255/32

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