For CPanel web hosting, normally, we can access via using below:
http://DOMAIN-NAME.com:208X
The URL may not be accessible cause it is trying to connect to the port 208X. This is due to the firewall is blocking the connection. This maybe happen when you are trying to access in restricted area such as corporate office.
In order to bypass the firewalls, you may try to use the below syntax:
http://cpanel.DOMAIN-NAME.com
