The station was an affiliate of the Don Lee Network, and also carried CBS Radio Network broadcasts until 1936, when KMJ switched its affiliation to the NBC Red Network. It remained an NBC affiliate until NBC ceased hourly newscasts in the 1990s. KMJ then joined ABC. When CBS was acquired by the Westinghouse Electric Corporation (later be renamed CBS Corporation), CBS Radio acquired KMJ from American Radio Systems in 1998. It then began carrying CBS News at the beginning of most hours.