I have found 100 U.S. Based Urban Radio Sites. Each of these sites has been verified, to ensure locale and the brand of music they play on a normal basis. All of them have rnb, rap, hip hop, trap, soul, and contemporary artists within their rotations.
http://www.soundfusionradio.net/
http://www.uwinradio.com/
http://www.faymusradio.com
http://www.defjay.com