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US area code · Arizona

623 area code

Where the 623 area code is, its overlay and how to dial a +1 623 number from anywhere.

CoversAvondale, ArizonaTime zoneMountain (MT)TypeOverlay
Quick answer

The 623 area code is in Avondale, Arizona, United States (Mountain (MT)). To call from abroad: +1 623 555-0123. It is an overlay, so all 10 digits are dialled.

StateArizona
Main areaAvondale
Time zoneMountain (MT)
TypeOverlay
10-digit dialingRequired
In service since11-Jan-1999

The 623 area code is a geographic North American Numbering Plan (NANP) code covering Avondale, Arizona. It has been in service since 11-Jan-1999 and sits in the Mountain (MT) time zone.

Overlay 623 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

623480602

How to dial a 623 number

From abroad+1 623 555-0123
Within the US / Canada1 623 555-0123
Locally (same area)623 555-0123

Cities in the 623 area code

A 623 number is usually in one of these places in Arizona — 1 county.

Avondale MaricopaGlendale MaricopaPeoria MaricopaSun City West MaricopaSurprise Maricopa

Other Arizona area codes

480520602928

Frequently asked questions

Where is the 623 area code?

The 623 area code is in Avondale, Arizona, United States (Mountain (MT)).

Is 623 an overlay area code?

Yes. 623 overlays the same region as 480, 602, so callers dial all 10 digits.

Do I have to dial 10 digits for 623?

Yes — dial the area code plus the seven-digit number.

How do I call a 623 number from another country?

Dial your exit code (or +), then 1, then 623, then the number: +1 623 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 623 number does not pinpoint a street or ZIP code.

Number holders in area code 623

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 326 prefixes are in use in 623, shared by 30 companies. The largest holders:

CompanyPrefixesShare
Qwest Corporation9730%
T-Mobile USA, Inc.3912%
Cellco Partnership Dba Verizon Wireless3110%
Onvoy, LLC299%
New Cingular Wireless PCS, LLC227%
Mcimetro Access Transmission Services LLC134%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 623 numbers

Reports to the FTC, last 30 days
690
Recorded messages or robocalls
69%
Rank among area codes
#108 of 670
Most reported subjects
Other (250)
Medical & prescriptions (210)
Calls pretending to be government, businesses, or family and friends (74)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 623 — cities & rate centres

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