Area code 623 serves the western suburbs of Phoenix, Arizona, including Glendale, Peoria, Avondale, and Sun City. Created in 1999 from a split with 602, it covers a fast-growing area with a mix of residential neighborhoods, retirement communities, and commercial centers. Glendale is home to major sports venues, while Peoria and Avondale attract families and tech businesses. The region supports sectors like aerospace, advanced manufacturing, and healthcare. With warm weather and proximity to the greater Phoenix economy, a 623 number aligns your brand with suburban growth and a Southwestern lifestyle. It’s a solid choice for real estate, healthcare, or small businesses in Arizona.