The station now known as WDCX has its roots in an earlier radio station, on a different frequency. In 1947, WRNYsigned on at 680 kHz. It was a low-power daytime-only station because it was on the same clear channel frequency as 25,000 watt CFTR/Toronto, which is only about 100 miles away from Rochester as the crow flies. WRNY added an FM sister station primarily to give the station a night signal, but in the 1950s, few listeners had FM radios. WRNY-FM signed off by 1955. From 1957 to 1965, WRNY ran a top 40 format, switching to the call signWRVM. In 1965, the top 40 music was gone and in its place was a country music format under a new call sign, WNYR. Country music lasted 22 years on the channel. A new sister station, WNYR-FM, signed on in 1966, this time becoming permanent. The AM station moved from 680 kHz to 990 kHz in early July 1979, allowing the station to broadcast 24 hours a day. In 1987, as country music became more popular on FM radio, this led to the establishment of 92.5 WBEE-FM. WNYR lost its advantage to WBEE and gave up on country music. The station changed call signs, and formats, to adult standardsWEZO on June 21, 1988. On February 26, 1990, the station changed its call sign to WRMM, and began simulcasting the FM's adult contemporary format. Then on May 14, 1993, after Atlantic Ventures merged with two other broadcasting companies to form American Radio Systems, WRMM switched to WCMF, and switched to simulcasting their FM namesake's classic rock format; the following year, the AM adopted a sports talk format. On August 1, 1997, after the station was sold from American Radio Systems to its current owner Crawford Communications, it became religious-formatted WDCZ; on December 1, 1999, the call letters changed to WLGZ and the station returned to adult standards. On February 11, 2008, the station's "Legends" format was modified to incorporate more oldies and soft adult contemporary material, and officially moved to sister station WLGZ-FM 102.7. The displaced Christian format is now being broadcast as an additional HD Radio signal on WLGZ. On May 23, 2008, AM 990 began broadcasting religious programming under the call sign WRCI which was previously assigned to WLGZ-FM prior to February 11, 2008, effectively accomplishing a call sign swap between the AM and FM stations. On September 1, 2008, the call sign was changed again to WDCX to match with sister station WDCX-FM in Buffalo.
