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Area code 623

Area code 623 serves Arizona, including Phoenix (Mountain time). It has been in service since March 1, 1999 and shares its area with 480 and 602.

Numbers starting with 623 drew 1,723 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 533 complaints to the FCC since November 2023. The number on your screen can be faked, so a 623 number proves nothing about where a call came from.

Location
ArizonaPhoenix-Mesa-Chandler, AZ Metropolitan Statistical Area
Time zone
Mountain
In service since
March 1, 1999Created from 602
Overlay
Same area as 480, 602
Local calls
Dial 10 digitsArea code needed, even next door
Exchanges in use
314 of 792held by 29 carriers
Projected to run out
3Q 2058NANPA forecast 2026.2

Complaints about 623 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 623. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

1,723

FCC complaints since November 2023

533

Different 623 numbers reported

2,057

FCC complaints naming a 623 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 202316
December 20238
January 202410
February 20246
March 20245
April 202425
May 202415
June 202413
July 202425
August 202413
September 202413
October 202426
November 202413
December 202414
January 202519
February 202519
March 202510
April 202523
May 202515
June 202522
July 202521
August 202516
September 202521
October 20251
November 20257
December 20256
January 202613
February 20264
March 202611
April 20269
May 202617
June 202611
July 202622
August 202614
September 202612
October 202632

What people said 623 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 1,162 of 1,723 reports were robocalls.

Show as a table
SubjectReports
Other653
Medical and prescriptions363
Calls pretending to be government, businesses, or family and friends233
Dropped call or no message125
Reducing your debt (credit cards, mortgage, student loans)81
Home improvement and cleaning48

Most reported 623 numbers

Numbers with at least five reports from three or more places in the last twelve months. Many of them are likely spoofed.

Places served by 623

NANPA lists 1 rate center for 623. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Phoenix314

Phone companies holding 623 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 72% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 29 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Qwest Corporation97
T-Mobile USA, Inc.39
Cellco Partnership dba Verizon Wireless - AZ31
Onvoy, LLC - AZ29
New Cingular Wireless PCS, LLC22
Mcimetro Access Transmission Services LLC13
Comcast IP Phone, LLC11
Level 3 Communications, LLC - AZ10

When today's 623 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
200112
20028
20041
20051
20068
200713
20086
20096
20106
20115
20125
20133
20142
201512
20166
20173
20186
20197
202016
202111
202217
20234
20242
20252
20265

Check a 623 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in Arizona

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show