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Sierra Vista, AZ is currently using one area code which is area code 520. Area code 520 was created from a
split of area code 602 in 1995. In addition to Sierra Vista, AZ area code 520 serves the major cities of Casa Adobes, Casa Grande, Catalina Foothills, Coolidge, Douglas, Drexel Heights, Eloy, Florence,
Nogales, Oro Valley, and Tucson. Sierra Vista, AZ does not utilize any area code overlays. |
