The station began operation in 1926 as WBNX, the call letters reflecting the station's location in the borough of the Bronx. One of the station's first permanent homes was inside Starlight Park, an amusement park located on the east bank of the Bronx River just south of East 177th Street. This tenancy lasted until 1932, when the Great Depression forced the park's closure, which then led to the station's eviction from its studios.

WBNX changed frequencies several times during its early years, eventually finding a permanent home on 1380 kHz, sharing time on the frequency with religious broadcaster WAWZ in central New Jersey. It operated 18 hours a day with general entertainment and brokered programming.

In 1960 WBNX was sold to United Broadcasting. By the mid-1960s, WBNX was airing a Spanish contemporary music format during most of its hours, with some Jewish-oriented and Italian-language programming on weekends.

In 1984 the station was renamed WKDM and became a full-time operation as United paid WAWZ owner Pillar of Fire to give up its portion of the time-share (WAWZ continued to operate on FM). It remained successful until the advent of a full-time Spanish format on WSKQ-FM in 1989, which pulled away listeners. As a result, in the early 1990s the station began to carry more leased-access/brokered shows. In 1992 it went completely brokered, and was sold to Multicultural in 1994.

In 1999 Multicultural transferred WKDM to Mega Communications in exchange for cash and various Washington D.C. area stations. Mega changed the call letters to WNNY and instituted an all news Spanish format (Noticas 1380). Eventually, the all-news evolved into a news/talk format. This format was not successful, and by 2002 Mega had changed the call letters to WLXE and the format to Mexican pop music as "X-1380". A few months later, Multicultural bought the station back and reinstated the WKDM call sign and the brokered programming policy.