WTTO, virtual and UHF digital channel 21, is a CW-affiliated television station serving Birmingham, Alabama, United States that is licensed to the suburb of Homewood. Owned by the Sinclair Broadcast Group, it is a sister station to ABC affiliate WBMA-LD (channel 58) and MyNetworkTV affiliate WABM (channel 68), both licensed to Birmingham. The three stations share studios at the Riverchase office park on Concourse Parkway in Hoover (with a Birmingham mailing address); WTTO's transmitter is located atop Red Mountain, near the Goldencrest neighborhood of southwestern Birmingham.