The U.S. state of Arizona is divided into three geographically distinct numbering plan areas (NPAs) which are identified by a total of five area codes, with one of the NPAs being configured as an overlay complex with two code.
602 was the original area code for Arizona, and was split in 1995 into 602, serving metropolitan Phoenix, and 520, serving the remainder of the state.[1] In 1999, 602 was split into 480, 602, and 623,[2] which were recombined in 2023.[3] 520 was split in 2001 to form area code 928.[4]
| Area code | Year | Parent NPA | Overlay | Numbering plan area |
|---|---|---|---|---|
| 602 | 1947 | – | 480/602/623 | Phoenix metropolitan area |
| 480 | 1999 | 602 | 480/602/623 | Phoenix metropolitan area; After having been split from 602 in 1999, the three area codes were recombined in 2023 into an overlay complex. |
| 623 | 1999 | 602 | 480/602/623 | |
| 520 | 1995 | 602 | – | Southern Arizona, including Tucson and its metropolitan area, Casa Grande, Nogales, and Sierra Vista |
| 928 | 2001 | 520 | – | Yuma, Kingman, Flagstaff, Prescott, the Arizona portion of the Navajo Nation, and Safford |
See also
References
- ^ "New 520 area code mandatory Saturday". Arizona Republic. Phoenix, Arizona. October 20, 1995. p. E1. Archived from the original on November 27, 2021. Retrieved November 27, 2021 – via Newspapers.com.
- ^ Balazs, Diana (March 31, 1999). "April Phones Day! E. Valley area code will be 480". Arizona Republic. Phoenix, Arizona. p. EV 5. Archived from the original on November 27, 2021. Retrieved November 27, 2021 – via Newspapers.com.
- ^ "NPA 480, 602 and 623 Boundary Elimination Overlay (Arizona)" (PDF). North American Numbering Plan Administrator. December 30, 2021. Archived (PDF) from the original on January 3, 2022. Retrieved January 3, 2022.
- ^ Tucker, Jeff (December 27, 2001). "Area code switch to 928 becomes final Jan. 5". Arizona Daily Sun. p. A2. Retrieved February 11, 2023 – via Newspapers.com.
