Калькулятор IP подсетей

178.128.240.0-178.128.250.255

178.128.240.0-178.128.247.255
178.128.240.0/21

178.128.248.0-178.128.249.255
178.128.248.0/23

178.128.250.0-178.128.250.255
178.128.250.0/24