Cheyenne River Sioux Tribe Telephone Authority (CRSTTA) is a tribal owned and operated full service telecommunication firm providing cutting-edge high-speed broadband services throughout the Cheyenne River Sioux Reservation in South Dakota. It was founded in 1992 and began operations in 1995 to provide telephone services to the reservation. With increased demand, it successfully launched a high speed fiber optic network in 2015. Throughout its operations, CRSTTA has maintained a focus on reliable, resilient, and customer-driven services. Its internet services offer fast speeds of up to 50 Mbps, depending on the location. Its customer service is top notch, providing responsive and knowledgeable service, as well as support for outages and issues.