840 Area Code: Pomona, California
Area code 840 serves Pomona, San Bernardino and Arrowhead, California in the Pacific time zone, in service since 2021. Consumers have filed 511 unwanted-call complaints against 375 different 840 numbers, 116 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 840 at a glance
- State
- California
- Main cities
- Pomona, San Bernardino, Arrowhead, Fontana, Chino, Claremont + 13 more
- Counties
- San Bernardino County, Los Angeles County, Riverside County
- Local time
- —Pacific
- In service since
- February 23, 2021
- Overlay of
- 909
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 19 rate centers, 129 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Most-reported 840 numbers
Ranked by FTC Do Not Call complaints this month, then all-time FTC and FCC complaints. Only numbers with enough complaints for a full report page are listed. Click one for what it was reported for and where.
What calls from 840 numbers are about
413 FTC Do Not Call complaints about 840 numbers since Jul 24. The most common named subject is debt-relief pitches, at 38% of complaints (87% of those were recorded messages). Overall, 79% of callers who answered said the call was a robocall.
FTC complaint subjects
- Debt reduction15838%
- Other / unspecified14435%
- Impostor (government, business, family)7017%
- No subject given164%
- Dropped call / no message123%
- Medical & prescriptions41%
- Lotteries, prizes & sweepstakes31%
FCC complaints by call type, last 2 years
- Prerecorded Voice1860%
- Live Voice723%
- Text Message517%
17% of recent FCC complaints about 840 numbers are about text messages, not calls.
When 840 spam calls come in
27% of complaints that give a call time describe calls between 9am and 12pm. 95% came Monday to Friday, most on Tuesdays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
127 FTC complaints about 840 numbers in the last four weeks, down 33% on the four weeks before. FCC complaints about 840 numbers peaked in 2023 (18); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
Only 18% of the FTC complaints about 840 numbers came from California residents; the most came from Florida, Texas and Illinois. 840 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Where complainants live
- California7618%
- Florida4711%
- Texas246%
- Illinois215%
- New Jersey205%
What people with 840 numbers report
People whose own number starts with 840 filed 53 FTC complaints since Jul 24. 19% were about calls showing another 840 number. The most common named subject was debt-relief pitches.
Area codes on the calls they reported
- 833 (toll-free)1325%
- 840 (same code)1019%
- 866 (toll-free)713%
- 888 (toll-free)48%
- 81836%
Busiest 840 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
| Prefix | Complaints | Numbers | Carrier | Exchange |
|---|---|---|---|---|
| (840) 221-xxxx | 34 | 32 | Hd Carrier LLC | San Bernardino |
| (840) 263-xxxx | 14 | 10 | AT&T Mobility (New Cingular Wireless PCS) | Fontana |
| (840) 666-xxxx | 9 | 2 | Fractel, LLC | Fontana |
| (840) 201-xxxx | 6 | 4 | AT&T Mobility (New Cingular Wireless PCS) | Fontana |
| (840) 222-xxxx | 5 | 5 | Fractel, LLC | San Bernardino |
Carriers operating in 840
NANPA has assigned 129 840 prefixes (NPA-NXX central-office codes) across 19 rate centers: 50% to wireless carriers, 50% to landline and VoIP operators; 100% are pooled blocks shared by several carriers. 14 prefixes were assigned in the last 12 months (newest 2026-10-20). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| T-Mobile USA | Wireless | 32(25%) | 13 | 2025-11-24 |
| Fractel, LLC | Competitive / VoIP (CLEC) | 26(20%) | 17 | 2022-02-23 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 23(18%) | 13 | 2026-10-20 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 18(14%) | 6 | 2026-10-07 |
| Verizon Wireless (Cellco Partnership) | Wireless | 13(10%) | 9 | 2026-10-06 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 4(3%) | 3 | 2022-10-24 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 3(2%) | 2 | 2025-09-16 |
| Terra Nova Telecom INC. | Competitive / VoIP (CLEC) | 3(2%) | 3 | 2020-12-23 |
| Ton80 Communications, LLC | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2022-02-18 |
| Boost Subscriberco L.L.C. | Wireless | 1(1%) | 1 | 2023-05-30 |
| Commio, LLC | Competitive / VoIP (CLEC) | 1(1%) | 1 | 2023-08-11 |
| Hd Carrier LLC | Competitive / VoIP (CLEC) | 1(1%) | 1 | 2022-10-21 |
Largest rate centers (exchanges) by prefixes: Pomona (16), San Bernardino (15), Arrowhead (14), Fontana (12), Chino (9), Claremont (8), Ontario (8), Upland (7), Colton (6), Highland (5). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 840 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 840 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in California
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: California Attorney General.
- California formally adopted the FTC's National Do Not Call Registry as its own state list rather than running a separate one, so a single free registration at donotcall.gov covers you. State authorities can still enforce against telemarketers who ignore it, in addition to any federal penalty.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 840: questions answered from the data
Where is area code 840?
Area code 840 serves Pomona, San Bernardino and Arrowhead, California, covering San Bernardino County, Los Angeles County and Riverside County. It has been in service since February 23, 2021.
What time zone is area code 840 in?
Area code 840 is in the Pacific time zone (UTC−8, or UTC−7 during daylight saving time). The current local time is shown at the top of this page.
What are calls from 840 numbers usually about?
Since Jul 24, consumers filed 413 FTC Do Not Call complaints about 840 numbers. The most common named subject was debt-relief pitches: 38% of complaints, 87% of them recorded messages. Across all subjects, 79% of callers who answered the question said the call was a robocall.
When do 840 spam calls happen?
27% of the complaints that give a call time describe calls between 9am and 12pm, and 95% came on weekdays, most often on Tuesday. Times are as consumers reported them.
Are calls from 840 numbers really local?
Not necessarily. Only 18% of the FTC complaints about 840 numbers came from California residents; the most came from Florida, Texas and Illinois. 840 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Are 840 robocalls increasing?
In the four weeks to Oct 15, consumers filed 127 FTC complaints about 840 numbers, 33% fewer than the four weeks before.
How do I report an 840 scam call in California?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In California, the California Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.