Калькулятор IP подсетей

121.12.143.0-121.12.175.255

121.12.143.0-121.12.143.255
121.12.143.0/24

121.12.144.0-121.12.159.255
121.12.144.0/20

121.12.160.0-121.12.175.255
121.12.160.0/20