The station is assigned the WPRX call letters by the Federal Communications Commission.
WPRX is the first wholly owned Puerto Rican station in the USA and airs music from the Caribbean, Central America, South America and Spain, as well as news direct from Puerto Rico. The station features nearly 100 percent local programming.
In 1977, the station, then WBIS, was purchased by David Rodgers, who owned stations in Salinas, California. Rodgers purchased the station from Robert Baker who had previously been the General Sales Manager at KDKA-TV in Pittsburgh. Rogers hired John Hiatt, a broadcaster from El Paso, Texas to run the radio station, and Rodgers owned the station for nearly a decade before selling the property. At that time, WBIS programmed a Soft Rock format and was located on 1440 (kHz) and was on the air only during the day.