623 Area Code

Area Code 623 Location: Arizona

Area code 623 covers the West Valley of the Phoenix metropolitan area, plus all of Phoenix north of Union Hills.

Counties Served by Area Code 623:

• Maricopa County

Major Cities in the 623 Service Area:

• Phoenix
• Glendale
• Tempe (Sliver)

Other Cities and Towns:

• Ahwatukee

Overlay System

Area codes 602, 480, and 623 are part of an overlay complex for the entire Phoenix metropolitan area. Area code 602 was established in 1947. Area codes 480 and 623 were created in 1999. Ten-digit dialing is mandatory across the Valley.

Area Code 623 Location Map

Area code 623 is a general purpose code which was placed in service on March 1, 1999.

623 Area Code Prefixes

Our Arizona phone number lookup service will analyze the three-digit prefix of any 623 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Arizona geographic region, and local calling area associated with the phone number.

Phone numbers follow the following structure under the North American Numbering Plan:

• NPA- area code (where the number was originally assigned)
• NXX - Central office code that locates the specific neighborhood and identifies the service provider
• XXXX - Subscriber number identifies the individual phone line within that local exchange

Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.

Prefixes by Company

Company	Number of Prefixes
QWEST CORPORATION	92
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	28
T-MOBILE USA, INC.	25
NEW CINGULAR WIRELESS PCS, LLC	18
MCIMETRO ACCESS TRANSMISSION SERVICES LLC	12
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	8
BANDWIDTH.COM CLEC, LLC - AZ	6
COMCAST IP PHONE, LLC	6
ONVOY, LLC - AZ	6
TELEPORT COMMUNICATIONS AMERICA, LLC - AZ	6
LEVEL 3 COMMUNICATIONS, LLC - AZ	5
METROPCS, INC.	5
XO ARIZONA, INC.	3
LEVEL 3 TELECOM OF ARIZONA, LLC - AZ	2
PEERLESS NETWORK OF ARIZONA, LLC - AZ	2
AT&T - LOCAL	1
CENTURYLINK COMMUNICATIONS, LLC	1
GILA LOCAL EXCHANGE CARRIER, INC. - AZ	1
GLOBAL CROSSING LOCAL SERVICES, INC. - AZ	1
MCLEODUSA TELECOMMUNICATION SERVICES, INC. - AZ	1

Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.

Prefixes by Rate Center

Rate Center	Number of Prefixes
PHOENIX	229

Other Arizona Area Codes

Browse other Arizona area codes: