Калькулятор IP подсетей 104.16.0.0-104.21.127.255
104.21.0.0-104.21.127.255
104.21.0.0/17
104.16.0.0-104.19.255.255
104.16.0.0/14
104.20.0.0-104.20.255.255
104.20.0.0/16
