520 Area Code
Southern Arizona, Arizona
Area code 520 is located in Southern Arizona, Arizona. It covers Tucson, Sierra Vista, and surrounding areas in the Mountain time zone (UTC-7). Administered by NANPA.
Where is area code 520?
Area code 520 is located in Southern Arizona, Arizona. It covers Tucson, Sierra Vista, and surrounding areas in the Mountain time zone (UTC-7).
Cities Covered by Area Code 520
Area code 520 primarily serves the Southern Arizona area of Arizona. The exact coverage includes Tucson, Sierra Vista, and Nogales, along with surrounding communities and suburbs.
Time Zone
Mountain Time — UTC-7
Area code 520 operates in the Mountain Time Zone. When calling 520 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 520
Area code 520 was introduced in 1995 as a geographic area code serving Southern Arizona, Arizona. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.