La 100 streams entertainment, music, and talk live from Buenos Aires on 99.9 FM, and you can listen free right now on Radio Shuffle. Known simply as "La 100," a name born from rounding its frequency up to a friendlier number, the station has spent decades as one of Argentina's most consistently listened-to FM signals, built on a mix of music blocks and personality-driven talk shows rather than a single strict format.
The station was created in 1987, after Grupo Clarín, one of Latin America's largest media conglomerates, acquired Radio Mitre and FM 5 Estrellas and folded their frequencies into what became La 100. It has stayed under the same ownership structure ever since, operating as Radio Mitre Sociedad Anónima with shareholders including Héctor Magnetto and the heirs of Ernestina Herrera de Noble, alongside Lucio Pagliaro and José Aranda. The station built out an extensive affiliate network over the decades, with more than 80 repeater stations carrying its signal across Argentina well beyond the capital.
La 100 operates today under CienRadios, the digital radio brand Grupo Clarín launched in 2008 to unify its two flagship stations, La 100 on FM and Radio Mitre on AM 790, into a single platform. That pairing put Argentina's leading FM entertainment station and one of its most established AM news and talk brands under one roof, giving Grupo Clarín a dominant footprint across both bands of the Buenos Aires radio dial.
The schedule leans heavily on personality radio, with shows built around well-known Argentine media figures rather than anonymous DJ shifts. El Club del Moro, hosted by Santiago Del Moro alongside Guido Kaczka, has run as one of the most listened programs on Argentine radio, anchoring the station's daytime lineup with a mix of conversation, music, and the kind of broad entertainment programming that keeps listeners tuned in across an entire workday rather than for a single segment.
For listeners who want a direct line into Buenos Aires' FM radio culture, La 100 streams free on Radio Shuffle, no sign-up required.