With the exception of you putting out an alert-worthy event that goes viral and triggers the app listener count notification (which snowballs your listener count with people from around the world), your listeners will always for the very most part be in the area served by the feed. There is no way to "pinpoint" a listener, because the vast majority will be listening on a mobile device, and geolocation of cell carrier's IP addresses is sketchy at best - and usually won't even be close to the general city where the user actually is. Hell even my home IP geolocates to the ISP's home office 100 miles away.