However, new radio networks have cropped up with their own owned-and-operated networks. iHeartMedia owns many stations in the top 100 U.S. markets, and in turn feeds them with programming, either from corporate subsidiary Premiere Radio Networks or via internal distribution; in particular, this is done with their talk radio station portfolio. Voicetracking purposes are handled either by internal methods or through their Premium Choice format menus, the latter of which is geared towards small and medium-market stations with air talent selected from stations in larger markets.