online CIDR and IP subnet calculator : Check host

104.206.123.0-104.206.123.255
104.206.123.0/24

104.206.124.0-104.206.127.255
104.206.124.0/22

104.206.128.0-104.206.191.255
104.206.128.0/18

104.206.192.0-104.206.223.255
104.206.192.0/19

104.206.224.0-104.206.239.255
104.206.224.0/20

104.206.240.0-104.206.247.255
104.206.240.0/21

104.206.248.0-104.206.248.255
104.206.248.0/24

IP subnet calculator 104.206.123.0-104.206.248.255