online CIDR and IP subnet calculator : Check host

104.18.56.0-104.18.63.255
104.18.56.0/21

104.18.64.0-104.18.127.255
104.18.64.0/18

104.18.128.0-104.18.255.255
104.18.128.0/17

104.19.0.0-104.19.127.255
104.19.0.0/17

104.19.128.0-104.19.191.255
104.19.128.0/18

104.19.192.0-104.19.207.255
104.19.192.0/20

104.19.208.0-104.19.215.255
104.19.208.0/21

104.19.216.0-104.19.217.255
104.19.216.0/23

104.19.218.0-104.19.218.255
104.19.218.0/24

IP subnet calculator 104.18.56.0-104.19.218.255