You can get a summary of the basic and advanced monitors that are active from our home page itself. The license widget at the top in the home page describes the active basic and advanced monitors. Not only that, you can filter the monitors by clicking on the basic/advanced monitors in the widget. The middle widget gives an overview of suspended monitors.
A summary of all monitors which are active can be taken from Admin > Subscription page. This includes total basic and advanced monitors as well as the plan details and other licenses if you have any.
I hope this helps you get a glance of the license you're consuming in your account. We however don't have them as reports that you can receive as an email or PDF. Would export as PDF/email work for you?