Subnet & CIDR Calculator

Calculate the network, broadcast, mask, wildcard, and host range for an IPv4 CIDR block.

This tool has been used 2 times

This IPv4 calculator runs entirely in your browser. Enter the address and prefix separately, or paste CIDR notation such as 192.168.1.25/24.

All subnet calculations are local to your browser; the entered network is not sent to the server.

How to use this tool

Enter an IPv4 address and a prefix from 0 to 32, or paste CIDR notation such as 192.168.1.25/24. Select Calculate to see the complete subnet range.