The Antenna Registration Online app allows users perform geographic searches of FCC Antenna Structure Registration data within the US. Users can search for antenna structures that are over 200 ft. by simply zooming to a location on the map. The app utilizes a credit-based system and includes a limited amount of free credits. Each search that returns data costs 1 credit. Searches that return no data or results over the system limit do not use any credits. After the initial credits are used, additional credits can be purchased within the app.