 KTLM's studios are located in the Chase Bank building in McAllen, and its transmitter is located near Rio Grande City.The station's original construction permit was issued to the Starr County Historical Foundation on June 10, 1994, with the call sign KAIO issued on September 1.The foundation intended to run KAIO as a non-commercial station promoting tourism in the Rio Grande Valley; that idea, however, was later abandoned.