Ipcalc - Command line tool for calculating Subnets and other IP address related stuffs

When doing any moderate to advanced networking, you are likely to have to deal with subnetting. While some people have an ability to do the binary math in their head to figure out the correct subnet-mask, some may find it difficult to calculate, for them Ipcalc is a tool in Linux which help them to calculate no. of subnets, subnetting mask and other Ip addressing related stuffs.

Ipcalc takes an