Changes were made regarding AM frequencies in 1941 as a result of the North American Regional Broadcasting Agreement; this moved WENR and WLS from 870 to 890 kHz. In August 1943, NBC was ordered to divest itself of the Blue Network and its stations; WENR and Blue were sold to Edward J. Noble. In 1945 the Blue Network would be renamed as the American Broadcasting Company. The station continued on at the Mart, as NBC's tenant, until 1952 when it moved back to the Civic Opera House. Paul Harvey worked as an evening newscaster on WENR from 1944 to 1951.