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Калькулятор IP подсетей
91.121.0.0-91.121.42.255

91.121.0.0-91.121.31.255
91.121.0.0/19

91.121.32.0-91.121.39.255
91.121.32.0/21

91.121.40.0-91.121.41.255
91.121.40.0/23

91.121.42.0-91.121.42.255
91.121.42.0/24