La 503 Online es una emisora salvadoreña de Apopa que transmite música del recuerdo y programación musical variada durante todo el día, enfocada en canciones que siguen vigentes y en complacer las solicitudes de sus oyentes.
On the air
La 503 Online San Salvador
Música del recuerdo sin límites
Apopa, El SalvadorBroadcasting in Spanish1950s1960s1970s1980sOldies & ClassicsVariety
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