Originally a production of Watermark Inc. (later a division of ABC Radio known as ABC Watermark, now Cumulus Media Networks), "AT40" is now distributed by Premiere Networks (a division of iHeartMedia). Nearly 500 radio stations in the United States, and several other territories worldwide air AT40, making it one of the most listened-to weekly radio programs in the world. It can also be heard on iHeartRadio, TuneIn and the official AT40 applications on mobile smartphones and tablets as well as on Xbox 360, Xbox One, PlayStation 4 consoles (via iHeartRadio's console app) and the Armed Forces Network. GEICO is the main sponsor for the show.