online CIDR and IP subnet calculator : Check host

104.23.209.0-104.23.209.255
104.23.209.0/24

104.23.210.0-104.23.211.255
104.23.210.0/23

104.23.212.0-104.23.215.255
104.23.212.0/22

104.23.216.0-104.23.223.255
104.23.216.0/21

104.23.224.0-104.23.255.255
104.23.224.0/19

104.28.0.0-104.28.7.255
104.28.0.0/21

104.24.0.0-104.27.255.255
104.24.0.0/14

IP subnet calculator 104.23.209.0-104.28.7.255