The license, as shown in the ULS database, gives you some clues to who is using the frequency, as well as how it is being used.
The "Main" tab of the license provides the address of the licensee, as well as a contact name. Sometimes, a Google check of the address will tell you what agency or department has their offices at that address, which can indicate who the license is intended for.
With the Dare Co license, Rodney Midgett - the current Dare County Sheriff - is the contact person, and the contact address is the sheriffs headquarters. The sheriffs department oversees the county public safety communications, and the communications section is located in the same building as the sheriffs department.
Sometimes, you can click on the license file number on the "Admin" tab, and a "Specific Service" tab will appear. On the Specific Service page, you will sometimes see the intended use of a frequency listed - although that's not the case this time.
Go to the "Frequency" tab. This page tells you that there are 6 fixed base licenses covered by the license (plus 3 more covered by another Dare Co license). There are no mobiles, but there are provisions for 1000 pagers.
Right away, one gets the idea that this new frequency is going to be used for paging.
If you click on one of the frequency entries, you will see the emission designator(s) the FCC approved for the frequency. With the Dare Co license, the approved designator is 11K2F3E . Translated, it simply means that Dare Co is approved to use the frequency for narrowband F.M. analog voice.
In summary, the information from the license seems to indicate the new frequency will be used for analog voice paging on a countywide channel, related to public safety.