At its official sign-on, it was one of several flagship media properties owned by Journal, which in addition to the "Journal" newspaper, also owned radio station WTMJ (1020 AM, now at 620 AM). In 1959, these properties were joined by WTMJ-FM (102.1 FM, now WKTI at 94.5). WTMJ-TV has been affiliated with NBC since its sign-on, owing to its radio sister's longtime affiliation with the NBC Red Network; although, it also initially carried programming from CBS, ABC and the DuMont Television Network. It lost its secondary affiliation with CBS when WCAN-TV (channel 25, now defunct) signed on in September 1953, and lost access to ABC and DuMont programming when WOKY-TV (channel 19, now CW affiliate WVTV on channel 18) made its debut one month later. WTMJ is the only television station in Milwaukee to have been affiliated with the same network throughout its history, and is currently NBC's second-longest tenured affiliate, behind only KSDK in St. Louis (which signed on as KSD-TV eleven months earlier in January 1947).