online CIDR and IP subnet calculator : Check host

211.216.18.0-211.216.19.255
211.216.18.0/23

211.216.20.0-211.216.23.255
211.216.20.0/22

211.216.24.0-211.216.31.255
211.216.24.0/21

211.216.32.0-211.216.63.255
211.216.32.0/19

211.216.64.0-211.216.95.255
211.216.64.0/19

211.216.96.0-211.216.111.255
211.216.96.0/20

211.216.112.0-211.216.119.255
211.216.112.0/21

IP subnet calculator 211.216.18.0-211.216.119.255