The Subnet Calculator is a Java applet designed to help network administrators and designers determine the subnet number from an IP address and subnet mask, or see the change in the number of hosts and subnets when modifying the subnet mask for a given network. The distribution files are:

• README.txt - Text file with history and usage information
• subcalc.tar - a tar file containing the distribution files
• subcalc.zip - a zip file containing the distribution files