KMSB (channel 11) is a television station in Tucson, Arizona, United States, affiliated with the Fox network. It is owned by Tegna Inc. alongside MyNetworkTV affiliate KTTU (channel 18); Tegna maintains a shared services agreement (SSA) with Gray Television, owner of CBS affiliate KOLD-TV (channel 13), for the provision of studio space and technical services and the production of local newscasts for KMSB. The stations share studios on North Business Park Drive on the northwest side of Tucson (near the Casas Adobes neighborhood). KMSB's lone transmitter is located atop Mount Bigelow; as a result of the transmitter's location, residents in the northern part of Tucson, Oro Valley, and Marana do not receive adequate reception of the station.