The Advanced IP Address Calculator is a freeware Windows 95/98/NT/2000/XP utility that lets you to calculate every aspect of your subnet configuration in a few mouse clicks! It was designed for any network engineer who needs a fast way to determine subnets.
For the information entered, the Calculator generates a color-coded bit map breaking down the network, subnet and host portion, shows you the subnet host address range, the subnet ID and subnet broadcast address. Important features like CIDR (Classless Inter-Domain Routing), the binary representation and hexadecimal representations of IP addresses are supported.