whatmask Alternatives
whatmask is described as 'Whatmask is a small C program that will help you with network settings and subnet calculations' and is an app. There are five alternatives to whatmask for Windows, Linux, Online / Web-based, Self-Hosted solutions and Mac. The best alternative is ship.sh, which is both free and Open Source. Other great apps like whatmask are LanCalculator, Advanced IP Address Calculator, ipcalc and Subnetter.
A simple, handy network addressing multitool with plenty of features.
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LanCalculator makes possible not only to easily calculate the subnet addresses range and subnet masks but also broadcast address, net address, net prefix and net mask inversion which is used in the access control lists (ACL) of Cisco network equipment.
Advanced IP Address Calculator (Free) - Easy-to-use IP subnet calculator that lets you to calculate every aspect of your subnet configuration in a few mouse clicks!
Discontinued
No stated support for recent Windows 10. Product appears to be quite old.
IP Calculator. ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range. By giving a second netmask, you can design subnets and supernets.
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