KLXX (1270 AM), known as "Super Talk 1270", is a radio station located midway between Mandan and Bismarck, North Dakota, USA. It has always been licensed to Mandan, although most of its audience is in neighboring Bismarck.The station was founded in 1926 as KGCU by the Mandan Radio Association and initially broadcast at 1250 on the dial. It is believed that the "GCU" portion of the original call letters stood for the initials of George C. Underwood, a member of the founding group.