WBIG-FM (100.3 FM) is a commercial radio station licensed to Washington, D.C. It has a classic rock radio format and is owned by iHeartMedia, Inc. The studios and offices are in Rockville, Maryland. WBIG-FM has an effective radiated power of 50,000 watts. Its transmitter is off Tower Street in Falls Church, Virginia. Besides a standard analog transmission, WBIG broadcasts using HD Radio technology, and is also available online via iHeartRadio. The station is also the official broadcast partner of the NFL's Washington Commanders. History WOOK-FM, WFAN The station first broadcast on 95.9, signing on the air in 1948. It was owned by the United Broadcasting Company and had the call sign WOOK-FM, as the companion to WOOK (1340 AM). The two stations largely simulcast their programming. The FM station soon changed call signs to WFAN, apparently to emphasize its status as the flagship of the Washington Senators radio network. The station moved to 100.3 MHz and upgraded power in 1952. WFAN broadcast in both English and Spanish, featuring tropical music programs for Washington's growing Latino population, mostly from Puerto Rico, Cuba and the Dominican Republic. By the late 1960s, WFAN was running its Spanish-language format full time, the first in the Washington area. FCC trouble In the mid-1970s, United Broadcasting, the owner of WFAN-FM, WOOK and WFAN-TV, along with semi-satellite WMET-TV, was beset by legal issues. In September 1975, the Federal Communications Commission (FCC) cited WOOK for broadcasting fraudulent advertising and denied renewal of its license. Faced with losing one of its two radio signals, United decided to preserve the more popular R&B format of WOOK. In December 1976, it moved the R&B format and WOOK call letters to 100.3 FM. Meanwhile, the WFAN call sign and Spanish tropical format, which had a smaller audience, moved to 1340 AM. The AM station's license expired April 22, 1978, and the 1340 AM allocation was turned over to WYCB. The decision to sacrifice the Spanish-language format led to complaints to the FCC from the local Hispanic community. Unlike equivalent bodies such as the Canadian Radio and Television Commission, the FCC does not concern itself with the type of programming broadcast by licensed stations, so it did not take action. In February 1984, WOOK rebranded as WDJY calling itself "DJ 100". Starting in October 1990, the station began playing smooth jazz as "Jazzy 100", and would subsequently change its call letters to WJZE.