341 Area Code: Oakland, California
Area code 341 serves Oakland, Hayward and Richmond, California in the Pacific time zone, in service since 2019. Consumers have filed 566 unwanted-call complaints against 519 different 341 numbers, 147 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 341 at a glance
- State
- California
- Main cities
- Oakland, Hayward, Richmond, El Sobrante–Pinole, Hercules–Rodeo, Crockett
- Counties
- Alameda County, Contra Costa County
- Local time
- —Pacific
- In service since
- July 22, 2019
- Overlay of
- 510
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 13 rate centers, 113 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Reported 341 numbers
No single 341 number has enough complaints yet for a full report page, so none are listed. Look up the exact number that called you: the lookup works on every US number, whether or not it has complaint history.
What calls from 341 numbers are about
373 FTC Do Not Call complaints about 341 numbers since Jul 24. The most common named subject is debt-relief pitches, at 31% of complaints (90% of those were recorded messages). Overall, 74% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified14840%
- Debt reduction11531%
- Impostor (government, business, family)3610%
- Dropped call / no message3610%
- No subject given216%
- Charities51%
- Home improvement & cleaning31%
FCC complaints by call type, last 2 years
- Prerecorded Voice4761%
- Live Voice2127%
- Text Message912%
12% of recent FCC complaints about 341 numbers are about text messages, not calls.
When 341 spam calls come in
30% of complaints that give a call time describe calls between 9am and 12pm. 93% came Monday to Friday, most on Thursdays, 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?
162 FTC complaints about 341 numbers in the last four weeks, up 45% on the four weeks before. FCC complaints about 341 numbers peaked in 2022 (45); 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 38% of the FTC complaints about 341 numbers came from California residents; the most came from Florida, Texas and Illinois. 341 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Where complainants live
- California14138%
- Florida236%
- Texas175%
- Illinois175%
- New York133%
Likely campaigns using 341 numbers
Groups of numbers that drew the same FTC complaint in the same pattern over the last 60 days. The grouping is statistical and doesn't identify who is calling.
Busiest 341 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 |
|---|---|---|---|---|
| (341) 216-xxxx | 10 | 10 | Bandwidth.com | — |
| (341) 333-xxxx | 10 | 10 | Fractel, LLC | Oakland |
| (341) 226-xxxxcampaign | 9 | 9 | Fractel, LLC | Oakland |
| (341) 205-xxxx | 6 | 6 | Bandwidth.com | Oakland |
| (341) 400-xxxx | 6 | 6 | Fractel, LLC | Oakland |
Carriers operating in 341
NANPA has assigned 113 341 prefixes (NPA-NXX central-office codes) across 13 rate centers: 26% to wireless carriers, 73% to landline and VoIP operators; 99% are pooled blocks shared by several carriers. 7 prefixes were assigned in the last 12 months (newest 2026-09-29). 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 |
|---|---|---|---|---|
| Fractel, LLC | Competitive / VoIP (CLEC) | 33(29%) | 12 | 2022-02-22 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 24(21%) | 12 | 2026-08-07 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 12(11%) | 6 | 2026-09-02 |
| T-Mobile USA | Wireless | 12(11%) | 8 | 2025-11-28 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 8(7%) | 6 | 2022-09-02 |
| Verizon Wireless (Cellco Partnership) | Wireless | 5(4%) | 3 | 2026-09-29 |
| Sonic Telecom, LLC | Competitive / VoIP (CLEC) | 4(4%) | 4 | 2022-09-01 |
| Commio, LLC | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2023-12-21 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2025-01-02 |
| Teleport Communications America, LLC | Competitive / VoIP (CLEC) | 2(2%) | 1 | 2022-09-19 |
| Telnyx LLC | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2021-11-21 |
| Ton80 Communications, LLC | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2022-02-18 |
Largest rate centers (exchanges) by prefixes: Oakland (37), Hayward (13), Richmond (10), El Sobrante–Pinole (9). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 341 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 341 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 341: questions answered from the data
Where is area code 341?
Area code 341 serves Oakland, Hayward and Richmond, California, covering Alameda County and Contra Costa County. It has been in service since July 22, 2019.
What time zone is area code 341 in?
Area code 341 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 341 numbers usually about?
Since Jul 24, consumers filed 373 FTC Do Not Call complaints about 341 numbers. The most common named subject was debt-relief pitches: 31% of complaints, 90% of them recorded messages. Across all subjects, 74% of callers who answered the question said the call was a robocall.
When do 341 spam calls happen?
30% of the complaints that give a call time describe calls between 9am and 12pm, and 93% came on weekdays, most often on Thursday. Times are as consumers reported them.
Are calls from 341 numbers really local?
Not necessarily. Only 38% of the FTC complaints about 341 numbers came from California residents; the most came from Florida, Texas and Illinois. 341 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Are 341 robocalls increasing?
In the four weeks to Oct 15, consumers filed 162 FTC complaints about 341 numbers, 45% more than the four weeks before.
How do I report a 341 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.