How do I add new ips to WHM/Cpanel?
Click the “Add A New IP Address” link under “IP Functions”.
You can add ranges of IPs in the following ways:
Class C CIDR format or 192.168.0.1-254 format may be used.
Valid Examples: 192.168.4.128/25, 192.168.3.5-10, 192.168.99.55-230
A CIDR notation table is provided on the page.