WMBB is the ABC-affiliated television station for Panama City, Florida. It broadcasts a high definition digital signal on VHF channel 13 from a transmitter in unincorporated Youngstown along the Bay and Calhoun County line. Owned by the Nexstar Media Group, the station has studios on Harrison Avenue/US 231 in Downtown Panama City.HistoryIt first began broadcast operations on October 4, 1973 as WDTB-TV started by Panhandle Broadcasting Corporation (run by attorney Denver T. Brannen, from where the original call letters were derived from), financed by local businessman/car dealer Tommy Thomas, and attorneys Julian Bennett and Dick Arnold. When it first took to the air, the channel was originally an NBC network affiliate. On February 28, 1977, WDTB was sold to Octagon Broadcasting, an Atlanta-based outfit. Upon the change, Octagon changed the station's call sign to the current WMBB (which stands for "The World's Most Beautiful Beaches").