The area code 623 is located in Phoenix, Arizona.
Area code 623 serves the West Valley of the Phoenix metropolitan area in Maricopa County, AZ. It covers fast-growing suburbs west and northwest of downtown Phoenix and works alongside area codes 602 (central Phoenix) and 480 (East Valley). This code helps route local phone numbers for homes, businesses, and major venues across one of the nation’s largest metro regions. It offers strong geographic identity for communities that anchor Phoenix’s western corridor.
Year established: 1999 (source: North American Numbering Plan Administration)
Area code 623 includes many West Valley cities and landmarks, with coverage in and around:
Created in 1999 from a split of 602, 623 reflects the rapid westward growth of greater Phoenix. The area is known for major sports and recreation, including the NFL’s Arizona Cardinals at State Farm Stadium, Cactus League spring training in Peoria and Surprise, and hiking in the White Tank Mountains. Most of the region observes Mountain Standard Time (UTC−7) year-round, as Arizona does not use Daylight Saving Time. For Phoenix-area callers, multiple area codes mean you’ll commonly see 602, 480, and 623 on local phone numbers tied to the same metro community.