online CIDR and IP subnet calculator : Check host

212.239.18.0-212.239.19.255
212.239.18.0/23

212.239.20.0-212.239.23.255
212.239.20.0/22

212.239.24.0-212.239.31.255
212.239.24.0/21

212.239.32.0-212.239.63.255
212.239.32.0/19

212.239.64.0-212.239.79.255
212.239.64.0/20

212.239.80.0-212.239.83.255
212.239.80.0/22

212.239.84.0-212.239.85.255
212.239.84.0/23

IP subnet calculator 212.239.18.0-212.239.85.255