WTTO

WTTO, virtual channel 21 (UHF digital channel 28), is a CW-affiliated television station serving Birmingham, Alabama, United States that is licensed to the suburb of Homewood. The station is owned by the Sinclair Broadcast Group, as part of a de facto legal triopoly with ABC affiliate WBMA-LD (channel 58) and MyNetworkTV affiliate WABM (channel 68). WTTO and WABM share studio facilities located on Beacon Parkway West in southeastern Birmingham; WTTO maintains transmitter facilities located atop Red Mountain, near the Goldencrest neighborhood of southwestern Birmingham.

WTTO operates a full-time satellite station, WDBB (virtual channel 17; UHF digital channel 18) in the Birmingham suburb of Bessemer, which is owned by Cunningham Broadcasting and operated by Sinclair under a time brokerage agreement. WDBB – which maintains transmitter facilities located east of State Route 69, near Windham Springs – relays WTTO's programming to areas of west-central Alabama that receive marginal to non-existent coverage from the latter station's main signal (including its primary city of service, Tuscaloosa). However, there is a decent degree of signal overlap between the coverage areas of WTTO and WDBB's signals in western portions of the Birmingham metropolitan area. On-air references to WDBB are limited to FCC-mandated hourly station identifications during station promotions and regular programming, with both stations using WTTO's virtual channel number in on-air branding.