Geographic Regions and Area Codes in Area Code 520

Area code 520 covers a significant portion of southeastern Arizona, including major cities such as Tucson, Casa Grande, Nogales, Marana, and Sierra Vista. This area code also encompasses several counties, including Pima, Pinal, Cochise, and Santa Cruz. The region is bordered by several other area codes, including 480 (Mesa, AZ), 575 (Las Cruces, NM), 602 (Phoenix, AZ), 623 (Phoenix, AZ), and 928 (Yuma, AZ).

Key regions within area code 520 include:

  • Tucson: The largest city in the area code with a population of 542,629 as of 2020.
  • Casa Grande: A growing city known for its strategic location between Phoenix and Tucson.
  • Nogales: A border town with significant cross-border trade activities.
  • Marana: A rapidly developing town with a focus on residential and commercial growth.
  • Sierra Vista: Known for its military presence and proximity to Fort Huachuca.