Калькулятор IP подсетей

207.81.152.0-207.81.255.255

207.81.152.0-207.81.159.255
207.81.152.0/21

207.81.160.0-207.81.191.255
207.81.160.0/19

207.81.192.0-207.81.255.255
207.81.192.0/18