The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.Numbering plan areas may be assigned multiple area …

This is a list of telephone area codes in Arizona.. 602 – For telephone numbers in Phoenix city proper except for Ahwatukee and some western parts of the city.; 520 – Southern Arizona, including Tucson, Nogales, Casa Grande, and Tombstone.; 480 – Maricopa County and parts of Pinal County, east of the Phoenix city limits and the Phoenix neighborhood of Ahwatukee.