IP-Calc 1.1 - the program is designed to assist in designing IP network topologies, and to assign IP addresses to hosts in those networks. The program allows you to select an address class and a subnet mask. It will show various information about the address class and subnet, including the bits used, the number of subnets and hosts, etc. You can then select a particular IP address, and the program will display the network, subnet, and host addresses for that address. It will also show a list of the subnets for that address. The program is written in NSBasic. You need to install two packages: IPCalc itself, and the NSBasic runtime. If you already have NSBasic installed, you do not need to install the runtime. The program was designed to work in portrait mode on a 2100. It also works in landscape mode. It also works on a 120/130 running NOS 2.0.
IPCalc is freeware.