American Top 40 – AT40 is an online radio station based in Los Angeles, California, United States. It specializes in broadcasting the latest and most popular hits across various genres, including adult contemporary, pop, R&B, rock, and top 40 music. The station features a dynamic mix of current chart-toppers and emerging artists, providing listeners with an up-to-date and engaging musical experience. Tune in to American Top 40 – AT40 for the best in contemporary music, offering a diverse and exciting playlist that caters to a wide range of tastes.