Калькулятор IP подсетей 130.239.0.0-130.239.25.255
130.239.0.0-130.239.15.255
130.239.0.0/20
130.239.16.0-130.239.23.255
130.239.16.0/21
130.239.24.0-130.239.25.255
130.239.24.0/23
