WTTO, virtual channel 21 (UHF digital channel 28), is a CW-affiliated television station serving Birmingham, Alabama, United States. Licensed to the nearby suburb of Homewood. WTTO maintains transmitter facilities located at Red Mountain. The station operates a full-time satellite, WDBB (virtual channel 17; UHF digital channel 18), which is licensed to Bessemer, another Birmingham suburb, but primarily serves Tuscaloosa and the western part of the market.