RTL is a French commercial radio network owned by the RTL Group. Founded in 1933 as Radio Luxembourg, it broadcast from outside France until 1981 because only public stations had been allowed until then. It is a general-interest, news, talk and music station, broadcasting nationally ("category E" as classified by the CSA) in France, Francophone Belgium, and Luxembourg. Until 2022, RTL was also broadcast on long wave frequency 234 kHz from Beidweiler which could be picked up in large parts of the continent. It has a sister station called Bel RTL tailored for the French Community of Belgium. As of 2018, RTL is France's most popular radio station with an average of 6.4 million daily listeners that year.