JetLicense allows you to add product licenses for a range of IP addresses. In order to do so, click on the “IP Licenses Bulk” tab at the main navigation bar. At the "IP Licenses Bulk" Page, click on the “+Add New IP License Bulk” button as demonstrated below:
On the following page, specify the "IP Address / Pool" to which the license(s) will be granted and add the description for that range, then click on the "Add IP Address or Range" button:
The “/ Pool” defines the number of IP addresses following the initial IP address
You'll then be redirected back to the "IP Licenses Bulk" page, now updated with the new IP / Pool and description you just added: