online CIDR and IP subnet calculator : Check host

72.203.0.0-72.203.127.255
72.203.0.0/17

72.203.128.0-72.203.191.255
72.203.128.0/18

72.203.192.0-72.203.207.255
72.203.192.0/20

72.203.208.0-72.203.215.255
72.203.208.0/21

72.203.216.0-72.203.219.255
72.203.216.0/22

72.203.220.0-72.203.221.255
72.203.220.0/23

72.201.0.0-72.201.255.255
72.201.0.0/16

72.202.0.0-72.202.255.255
72.202.0.0/16

IP subnet calculator 72.201.0.0-72.203.221.255