Los 40

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Los 40 (The 40, stylized as LOS40 and formerly Los 40 Principales, Spanish: Los Cuarenta) is a Top 40 music radio network and radio station brand in many Spanish-speaking countries from PRISA Radio. The station has its origins as a music show at Radio Madrid in 1966, today Cadena SER, where the 40 Principales chart was born, then evolved into a standalone radio station in 1979.

Some stations under this brand name are owned and operated or are licensed by PRISA to use the brand. A local broadcasting company operates some LOS40 stations. This local station is affiliated with the company that holds a license to use the brand from Grupo PRISA. Each LOS40 network typically broadcasts its own national feed from its respective country.