IP Subnet Calculator

Enter an IPv4 address and CIDR prefix to calculate the network address, broadcast address, subnet mask, and usable host range.

IP addressCIDR prefix

Network address192.168.1.0

Subnet mask255.255.255.0

Broadcast address192.168.1.255

First usable host192.168.1.1

Last usable host192.168.1.254

Total addresses256

Usable hosts254

Example input

192.168.1.10/24

Example output

192.168.1.0 – 192.168.1.255