In the 1930s, the experimental station W3XE, owned by Philco, became the first television station in Philadelphia; it became NBC's first affiliate in 1939, and later became KYW-TV (CBS). WCAU-TV, WPVI-TV, WHYY-TV, WPHL-TV, and WTXF-TV had all been founded by the 1970s. In 1952, WFIL (now WPVI) premiered the television show Bandstand, which later became the nationally broadcast American Bandstand hosted by Dick Clark. Today, as in many large metropolitan areas, each of the commercial networks has an affiliate, and call letters have been replaced by corporate IDs: CBS3, 6ABC, NBC10, Fox29, Telefutura28, Telemundo62, Univision65, plus My PHL 17 and CW Philly 57. The region is served also by public broadcasting stations WYBE-TV (Philadelphia), WHYY-TV (Wilmington, Delaware and Philadelphia), WLVT-TV (Lehigh Valley), and NJTV (New Jersey). In September 2007, Philadelphia approved a Public-access television cable TV channel.