netcalc-ng 2.1.7 (The man file)

netcalc-ng is an IP network calculator that can calcuate host IP ranges, subnet
masks, and split networks. It is a clone of sipcalc and uses the output format
of ipcalc.

Attention:
Renamed from the original name netcalc to netcalc-ng because of the existance
of a specific netcalc tool in the eisfair base system. Never replace the
eisfair netcalc by the binary from this package.

https://github.com/troglobit/netcalc