Where Is Area Code 623?
Area code 623 is found in the US state of Arizona. Primarily servicing the city of Glendale (population: 289569), area code 623 covers 1 county of Arizona.
Located in the Mountain time zone, area code 623 is on the same time as Phoenix, AZ.
Area code 623 was brought into effect on March 1, 1999. 623 was split from the parent 602 area code.
Counties in Area Code 623
- Maricopa.
Most Populous Cities in Area Code 623
| City | County | City Population | Time Zone |
|---|---|---|---|
| Glendale | Maricopa | 289,569 | MST |
| Peoria | Maricopa | 163,271 | MST |
| Surprise | Maricopa | 123,868 | MST |
| Avondale | Maricopa | 77,267 | MST |
| Goodyear | Maricopa | 69,232 | MST |
| Buckeye | Maricopa | 65,959 | MST |
| Sun City | Maricopa | 46,623 | MST |
| El Mirage | Maricopa | 32,828 | MST |
| Tolleson | Maricopa | 32,026 | MST |
| Sun City West | Maricopa | 28,610 | MST |
| Litchfield Park | Maricopa | 27,122 | MST |
| Waddell | Maricopa | 9,031 | MST |
| New River | Maricopa | 7,960 | MST |
| Wittmann | Maricopa | 6,919 | MST |
| Tonopah | Maricopa | 6,862 | MST |
| Cashion | Maricopa | 6,548 | MST |
| Youngtown | Maricopa | 6,357 | MST |
| Morristown | Maricopa | 1,628 | MST |
| Luke AFB | Maricopa | 1,533 | MST |
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.
This page was last updated on July 3, 2015.