Area code
Area code 623 — Phoenix, AZ
Arizona · in service since March 1, 1999
Area code 623 covers the Phoenix, AZ area. It is an overlay: 480, 602 serve the same area, so neighbors can have different area codes.
Local time in Phoenix
Spam reports from Sep 23 – Oct 22, 2026
Average #191 of 461 codes
476 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneMountain Standard Time (no daylight saving)
- Local calls10 digits
- Prefixes328 assigned
- Runs out~4Q 2056
- Unwanted call?Block & report
Spam call reports about 623 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 59 |
| Sep 14 | 141 |
| Sep 21 | 126 |
| Sep 28 | 73 |
| Oct 5 | 106 |
| Oct 12 | 103 |
| Oct 19 (4 days) | 108 |
Compared with all codes
- Robocalls
- 72%all codes 75%
- Callers with the same code
- 68%all codes 35%
- Rank by complaints
- #191of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 8520 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Medical & prescriptions | 174 24% | |
| Calls pretending to be government, businesses, or family and friends | 79 11% | |
| Dropped call or no message | 63 9% | |
| Reducing your debt (credit cards, mortgage, student loans) | 33 5% | |
| Home improvement & cleaning | 22 3% | |
| Warranties & protection plans | 14 2% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Arizona | 580 81% | |
| California | 13 2% | |
| Oregon | 13 2% | |
| Georgia | 10 1% | |
| Ohio | 10 1% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 623 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| PHOENIX | Phoenix | Maricopa County | 314 |
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Arizona
- Assigned by NANPA
- January 11, 1999
- Local dialing
- 10 digits (NANPA: 10D)
- NANPA planning letters
- PL-576, PL-216, PL-181, PL-153
Source: NANPA, NPA database of Oct 24, 2026.
Is 623 running out of numbers?
Previous forecast (October 2025): 2047, moved later by 9 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 623 prefixes
The five largest of 31 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Qwest Corporation | 97 30% | |
| T-Mobile USA, Inc. | 39 12% | |
| Verizon Wireless | 31 9% | |
| Onvoy, LLC | 29 9% | |
| New Cingular Wireless PCS, LLC | 22 7% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 623
What area code is 623?
An Arizona area code, in service since March 1, 1999.
Where is 623 area code, and what time zone is it in?
Phoenix, AZ; Mountain Standard Time (no daylight saving).
Why am I getting spam calls from 623?
476 FTC complaints from Sep 23 – Oct 22, 2026, most often about medical & prescriptions (not verified by the FTC; caller ID can be spoofed).
Will 623 get a new area code?
NANPA forecasts exhaust in 4Q 2056; no relief planning listed.