623 Area Code: Glendale, Arizona

The 623 area code anchors on Glendale, Arizona, and serves much of the West Valley of metropolitan Phoenix. Glendale itself sits west of downtown Phoenix, organized around a historic downtown with a sizable cluster of antique shops and, on its outskirts, a sports and entertainment district built around a major football stadium and a hockey arena. The 623 footprint reaches into Peoria, Surprise, El Mirage, and the bedroom communities that pushed steadily west through the postwar decades as new highway capacity opened.

Records the directory holds tied to 623 numbers frequently surface other Arizona cities — Mesa, Phoenix, Tucson, and Yuma among them. None sit inside 623; their appearance in records reflects how numbers travel through porting, prior registration, and address overlap, none of which respect numbering-plan boundaries. The directory currently tracks 250 distinct prefixes within 623, a documented subset of the live total. Active prefixes assigned to the code run higher than this working figure.

Home values in Glendale come in modestly above the US median, in line with the broader Phoenix-metro housing pattern. Household income runs slightly under the national reading, the median age skews a few years younger than the country, and the city's population places it among the larger municipalities in Arizona — large enough to function with its own civic identity rather than as a dependency of Phoenix proper, even where the two run continuously together.