Los 40

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. LOS40 is the number one music station in most of the regions it serves.

Some stations under this brand name are owned and operated or are licensed by PRISA to use the brand. Some LOS40 stations are operated by a local broadcasting company and 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.