Geographic Regions and Area Codes

Area Code 623 is located in the state of Arizona and primarily covers the western part of the Phoenix metropolitan area. The major cities within this area code include Phoenix, Glendale, and Chandler. Additionally, it spans across Maricopa County and Yavapai County. This area code is part of a three-code overlay complex that includes Area Codes 602 and 480. This overlay requires ten-digit dialing for all calls within the region.

Area Code 623 was established in 1999 to accommodate the growing population and demand for phone numbers in the Phoenix metropolitan area. This makes it a relatively new area code compared to others in the region.