Area code
Area code 840 — Pomona, CA
California · in service since February 23, 2021
Area code 840 covers parts of California; the place with the most of its prefixes is Pomona. It is an overlay: 909 serves the same area, so neighbors can have different area codes.
Overlay, same area: 909
Local time in Pomona
Spam reports from Sep 23 – Oct 22, 2026
Low #365 of 461 codes
129 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zonePacific Time
- Local calls1 + 10 digits
- Prefixes143 assigned
- Runs out~1Q 2056
- Unwanted call?Block & report
Spam call reports about 840 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 15 |
| Sep 14 | 36 |
| Sep 21 | 40 |
| Sep 28 | 41 |
| Oct 5 | 25 |
| Oct 12 | 18 |
| Oct 19 (4 days) | 18 |
Compared with all codes
- Robocalls
- 79%all codes 75%
- Callers with the same code
- 3%all codes 35%
- Rank by complaints
- #365of 461 · bottom quarter
- FCC complaints, Oct 2025 – Sep 2026
- 182 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 70 36% | |
| Calls pretending to be government, businesses, or family and friends | 43 22% | |
| Dropped call or no message | 5 3% | |
| Medical & prescriptions | 2 1% | |
| Computer & technical support | 1 1% | |
| Home improvement & cleaning | 1 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| California | 38 20% | |
| Florida | 24 12% | |
| New Jersey | 13 7% | |
| Texas | 12 6% | |
| Georgia | 10 5% |
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 840 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| POMONA | Pomona | Los Angeles County | 16 |
| S BERNDINO | San Bernardino | San Bernardino County | 15 |
| ARROWHEAD | — | — | 14 |
| FONTANA | Fontana | San Bernardino County | 12 |
| CHINO | Chino | San Bernardino County | 9 |
| CLAREMONT | Claremont | Los Angeles County | 8 |
| ONTARIO | Ontario | San Bernardino County | 8 |
| UPLAND | Upland | San Bernardino County | 7 |
| COLTON | Colton | San Bernardino County | 6 |
| HIGHLAND | Highland | San Bernardino County | 5 |
Plus 9 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- California
- Assigned by NANPA
- June 13, 2019
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-529
Source: NANPA, NPA database of Oct 24, 2026.
Is 840 running out of numbers?
Previous forecast (October 2025): 2054, moved later by 2 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 840 prefixes
The five largest of 16 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| T-Mobile USA, Inc. | 32 22% | |
| Fractel, LLC | 26 18% | |
| Onvoy, LLC | 23 16% | |
| New Cingular Wireless PCS, LLC | 18 13% | |
| Verizon Wireless | 13 9% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 840
What area code is 840?
A California area code, in service since February 23, 2021.
Where is 840 area code, and what time zone is it in?
Pomona, CA; Pacific Time.
Why am I getting spam calls from 840?
129 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 840 get a new area code?
NANPA forecasts exhaust in 1Q 2056; no relief planning listed.