IPv4 Network Calculator

The tool has been moved to the page below:
https://www.iotools.net/network/subnet-calculator

See also: CIDR/Mask lookup table and number of machines per subnet.
The IPv4 subnet calculator takes the IP address and mask or CIDR and calculates the address network, broadcast address, Cisco wildcard, CIDR, number of machines, maximum number of subnets, address of the first and Latest machine. It is also intended to be a very good educational tool to present results and understand binary values.