IP Address Subnet Calculator is a free Chrome add-on developed by sandbox. As the name suggests, this program allows users to calculate IP addresses and subnet masks. It is especially useful for network administrators and those working with Cisco devices.

With IP Address Subnet Calculator, users can easily perform calculations for IP addresses and subnet masks. It provides a convenient tool for determining the network and host portions of an IP address, as well as calculating the subnet mask based on the number of hosts required.

This add-on is designed to be simple and straightforward, focusing on providing the essential features needed for IP address and subnet mask calculations. It does not include any unnecessary or complex functions, making it accessible to users of all levels of technical expertise.