ipcalc

v 0.41

calculates various network masks etc. from given ip-address

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.

http://jodies.de/ipcalc/

To install ipcalc, paste this in macOS terminal after installing MacPorts

sudo port install ipcalc

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