IPv4 Calculator Subnetting / VLSM is a must-have tool for IT professionals and students. It offers two different techniques for subnet division, namely Subnetting and VLSM. The tool provides essential data for each new subnet, such as the network address, the first and last hosts, the broadcast address, and the subnet mask.

One of the best features of IPv4 Calculator Subnetting / VLSM is its ability to store the results in a local database. This means that users can access their previous results without having to redo the calculations. Moreover, the tool also allows users to export the calculations in an .xls file, making it easy to share data with others.

Overall, IPv4 Calculator Subnetting / VLSM is an excellent tool for those who need to work with subnets. Its user-friendly interface and useful features make it a valuable addition to any IT professional or student's toolkit.