If you are a network administrator, surely you are looking for tools that can help you in your day-to-day life. An example of this type of tools is netcalc. It is a free, free program that is used to convert IP address values and subnet mask prefixes. All with a remarkable ease.
This network calculator Advanced can help you with address planning for any size network. With netcalc you will have a tool specially designed for network administrators, with which you can add networks, perform subtractions, additions, etc. Quite frequent features when managing a network, especially when they have a certain size and you have to use masks, and with netcalc you can do it quickly. In addition, future versions are expected to add more functionality.
netcalc allows you to work both with IPv4 as well as with the new IPv6, working in any case very efficiently even when networks are very extensive. To do this, it relies on a netaddr library for address manipulation.
Also, you should know that it is a program written in python, making it very portable. Of course, you will need the interpreter of this interpreted language. And, although it works with Python 2, it is recommended to have Python 3 installed. If you already have it installed, and you have pip, you can easily install it with it if you prefer. And by the way, you also have DEB packages for Debina-based distros, or the source package directly.
Its use is Very simple, you can see more information and download what you need from your Official site.