American Broadcasting Company its territories. ABC News provides news and features content for select radio stations owned by Citadel Broadcasting, which purchased the ABC Radio properties in 2007 (however relaunched in 2014). In the 1930s, radio in the United States was dominated by three companies: the Columbia Broadcasting System (CBS), the Mutual Broadcasting System, and the National Broadcasting Company (NBC). The last was owned by electronics manufacturer Radio Corporation of America (RCA), which owned two radio networks that each ran different varieties of programming, NBC Blue and NBC Red. The NBC Blue Network was created in 1927 for the primary purpose of testing
History of WFAN chains operated by the National Broadcasting Company. By 1928, WEAF was purchased by NBC's parent company, the Radio Corporation of America. As a result of the North American Regional Broadcasting Agreement of 1941, WEAF became a clear-channel station and could be heard across most of the eastern half of North America at night. In 1943, the United States Supreme Court, citing antitrust concerns, ordered RCA to sell off one of its radio networks. The company decided to keep the Red Network, and it was rebranded as the NBC Radio Network after the Blue Network was divested to Edward J. Noble.