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SubNetCalc is an IPv4/IPv6 subnet address calculator. For given IPv4 or IPv6
address and netmask or prefix length, it calculates network address, broadcast
address, maximum number of hosts and host address range. Also, it prints the
addresses in binary format for better understandability. Furthermore, it prints
useful information on specific address types (e.g. type, scope, interface ID,
etc.).

See the manpage of subnetcalc for details!

Usage examples:
subnetcalc 172.31.255.254 255.255.255.0
subnetcalc 172.31.255.254 24
subnetcalc fec0:2345:6789:1111:221:6aff:fe0b:2674 56
subnetcalc www.iem.uni-due.de 24
subnetcalc fd00:: 64 -uniquelocal
subnetcalc fd00::9876:256:7bff:fe1b:3255 56 -uniquelocalhq