May 26, 2018
ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range. By giving a second netmask, you can design sub- and supernetworks. It is also intended to be a teaching tool and presents the results as easy-to-understand binary values.
Enter your netmasks in CIDR notation /25 or dotted decimals 255.255.255.0. Inverse netmasks are recognized.