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Историческую версию Vlsm IP Subnets Calculator можно получить на Android
Калькулятор VLSM подсети CIDR
Quick-Vlsm is intend for automate and simplify VLSM calculation process.
How to use: Enter major network address and mask in slash-format, like 192.168.1.0/24
Enter sizes (number of assignable ip addresses) of subnets to divide major network