173.239.0.0-173.239.31.255 173.239.0.0/19
173.239.32.0-173.239.47.255 173.239.32.0/20
173.239.48.0-173.239.55.255 173.239.48.0/21
173.239.56.0-173.239.59.255 173.239.56.0/22