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: 223.255.240.0/20
Addresses: 4096 (2¹²)
First IP: 223.255.240.0 (0.240.255.223.in-addr.arpa)
Last IP: 223.255.255.255 (255.255.255.223.in-addr.arpa)

/8 Operated By: APNIC

Related Networks

223.0.0.0/8
222.0.0.0/8
224.0.0.0/8
223.255.224.0/19
223.255.240.0/32
223.255.255.255/32

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