CBS Radio, Inc., formerly known as Infinity Broadcasting Corporation, is one of the largest owners and operators of radio stations in the United States, fourth behind main rivals iHeartMedia, Inc. (previously Clear Channel Communications, which owns many of the stations that were previously owned by former CBS parent Viacom before 1997), Cumulus Media, and Townsquare Media. CBS Radio owns and operates 117 radio stations across the country. It is currently part of CBS Corporation, which also owns the CBS radio and television networks, and jointly owns the CW Television Network.