 Both initially carried Radio México Internacional, a service of the Instituto Mexicano de la Radio, but the Mazatlán station switched in 2019 to a simulcast of IMER's Reactor 105 in Mexico City.The SPR held concessions to build stations at 88.7 in Tehuacán (XHTHP-FM) and 104.7 in Matías Romero, Oaxaca (XHMRO-FM), which were surrendered to the IFT in 2019.Stations to be built