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623 Area Code

Area code 623 serves Phoenix, Glendale, Scottsdale, Sun City, El Mirage and nearby communities in Arizona. It has been in service since March 1, 1999, when it was split from 602.

StateArizona
Time zoneMountain
Local time now…
Prefixes in use314
Overlay with480, 602
Projected to run out2056
PhoenixGlendaleScottsdaleSun CityEl MirageParadise ValleyYoungtownPhoenixScottsdale
Cities and towns served by area code 623

Who issues 623 numbers

Mobile 29%VoIP and cable 30%Landline 41%

Share of the 314 prefixes (the three digits after 623) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Lumen (Qwest)97
T-Mobile39
Onvoy (Sinch)35
Verizon Wireless31
AT&T Mobility22
Verizon Business (MCImetro)13
Lumen (Level 3)12
Comcast (Xfinity)11

Cities and towns in area code 623

CityPopulationOther area codes
Phoenix1,665,481480, 602
Glendale260,572480, 602
Scottsdale243,006480, 602
Sun City38,018480, 602
El Mirage35,820480, 602
Paradise Valley12,251480, 602
Youngtown7,039480, 602

Got a call from 623?

A 623 number was originally issued in Arizona, but that does not prove the caller is there. 30% of 623 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 314 prefixes in area code 623

Format: (623) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 623

Where is area code 623?
Area code 623 is in Arizona. It covers Phoenix, Glendale, Scottsdale, Sun City, El Mirage, Paradise Valley and 1 more cities and towns.
What time zone is area code 623?
Area code 623 is in the Mountain time zone (Arizona does not observe daylight saving time).
Is 623 a toll-free number?
No. 623 is a geographic area code in Arizona. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 623 share its area with 480 and 602?
480, 602 and 623 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 623 run out of numbers?
NANPA's latest forecast projects the 480/602/623 overlay to exhaust in the fourth quarter of 2056. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Arizona