341 Area Code — Oakland/Berkeley, California
About the 341 Area Code
Area code 341 covers Oakland/Berkeley, California—one of North America's most forward-leaning telecommunications markets, where VoIP, hosted PBX, and app-based calling have largely displaced traditional wireline infrastructure. All national carriers—AT&T Mobility, Verizon Wireless, and T-Mobile USA—compete for subscribers alongside cloud communication platforms. Oakland and Berkeley anchor this high-density corridor, which operates on Pacific time.
Key Information
- Region: Oakland/Berkeley
- State / Province: California
- Timezone: Pacific
- Major Cities: Oakland, Berkeley
Area Code Overview
Area code 341 is an overlay for area code 510, added in 2023 to address number exhaustion in the East Bay region. It covers the same geography as 510: Oakland, Berkeley, Fremont, Hayward, Richmond, and the broader Alameda County. The East Bay is one of the most economically and demographically diverse regions in the United States — Oakland is a major port city and a hub for labor and environmental justice organizing, Berkeley is home to the University of California's flagship campus, and Fremont's manufacturing corridor hosts large South Asian, Afghan, and Southeast Asian communities. The overlay addition means that 341 numbers are predominantly new mobile and VoIP assignments, making them the most likely East Bay codes to appear on caller ID from unfamiliar sources.
Scam Patterns in 341
Port of Oakland Cargo Release and Import Fraud
The Port of Oakland is the fifth-busiest container port in the United States and the primary Pacific gateway for agricultural exports and consumer imports serving the western interior. Small importers, third-party logistics providers, and individual recipients of international freight regularly receive legitimate cargo release and customs clearance notifications. Scam texts from 341 numbers exploit this by impersonating freight brokers, terminal operators, or customs brokers — claiming a container or parcel has been held pending a port storage fee, a phytosanitary inspection surcharge, or a terminal security deposit. Because Oakland's port community is large and accustomed to receiving time-sensitive cargo release messages from multiple parties, recipients are less likely to slow down and verify before acting. The texts harvest wire transfer instructions, routing numbers, or login credentials for freight management portals.
Oakland Housing Crisis Tenant Rights and Rent Control Fraud
Oakland has one of the most aggressive tenant protection ordinances in California — the Rent Adjustment Program (RAP) administers rent control for a large portion of the city's rental stock, and Just Cause for eviction protections cover most Oakland tenants. This legal landscape is well-known to renters, many of whom have navigated eviction defense proceedings or rent petition filings. Scam texts from 341 numbers impersonate the Oakland Rent Adjustment Program or Alameda County legal aid organizations, claiming a tenant's rent petition has been filed against them, that a property owner has initiated a "Costa-Hawkins exemption proceeding" requiring an immediate response, or that a tenant may be entitled to a retroactive rent overcharge refund — available only after paying a processing fee and submitting banking details. These texts exploit legitimate tenant anxiety around Oakland's volatile housing market and the genuine complexity of its rent control laws.
Labor Union Dues and Worker Compensation Fraud
Oakland and the East Bay have one of the most unionized workforces in California — ILWU longshore workers at the port, SEIU healthcare workers, Teamsters in logistics and warehousing, UFCW grocery workers, and building trades throughout the construction industry. Scam texts from 341 numbers impersonate union administrative offices or the California Labor Commissioner's Office, claiming a member's dues account is past due and at risk of affecting their collective bargaining agreement status, or that unclaimed workers' compensation benefits from a prior employer are available for collection upon submission of Social Security number and bank details. Because union members routinely receive texts from their locals about dues, elections, and contract votes, these fraud texts blend into an existing communication pattern. Environmental justice organizations in West Oakland and Richmond are also impersonated, soliciting payments for community funds or legal settlements that do not exist.
VoIP and Spoofing Risk Assessment
Risk Level: HIGH
341 is a 2023 overlay, meaning the code has no legacy landline history — effectively all 341 numbers are mobile or VoIP assignments from the outset. This makes 341 a preferred choice for scam operations that need a plausible East Bay number: there is no established baseline of 341 landline business numbers against which a fraudulent 341 text would stand out. The port logistics fraud pattern is amplified by the commercial VoIP availability that freight and logistics businesses use legitimately, making spoofed 341 numbers indistinguishable from real freight broker contacts. Oakland's dense network of labor and tenant rights organizations creates an unusual secondary fraud surface that is specific to this geography.
What To Do If You Receive a Text From a 341 Number
Step 1: Verify any port or freight release notice through your licensed customs broker or freight forwarder directly. Contact your broker through their known phone number or email — not through links in unsolicited texts. The Port of Oakland does not contact cargo recipients directly via text to collect fees.
Step 2: Look up the number. Search at Who Sent That Text Message for prior reports on the specific 341 number, including whether it has been flagged for port logistics fraud, tenant rights impersonation, or labor union dues scams.
Step 3: Verify rent program and labor commissioner contacts through official sources. The Oakland Rent Adjustment Program can be reached at 510-238-3721 and at oaklandca.gov/rap. The California Labor Commissioner's Office does not collect dues or process benefit claims through text links. See our guide on identifying spoofed text messages.
Step 4: Report. Forward to 7726 (SPAM). Report port logistics wire fraud to the FBI's Internet Crime Complaint Center at ic3.gov. File with the FTC at reportfraud.ftc.gov. Report labor law impersonation to the California Labor Commissioner at dir.ca.gov/dlse.
Frequently Asked Questions
What area code is 341?
Area code 341 is an overlay for the 510 area code, added in 2023 to serve the East Bay region of California. It covers the same geography as 510: Oakland, Berkeley, Fremont, Hayward, Richmond, and Alameda County. Because it is a new overlay, nearly all 341 numbers are mobile or VoIP assignments.
Is area code 341 used for scams?
341 is a legitimate East Bay area code added in 2023. Because all 341 numbers are new mobile and VoIP assignments with no landline history, it is attractive for scam operations. Documented fraud patterns in this geography include Port of Oakland cargo release and customs fee fraud, Oakland Rent Adjustment Program tenant rights impersonation, and labor union dues and workers' compensation scams targeting the East Bay's unionized workforce. Verify any unknown 341 text requesting payment or personal information before responding.
Why does Oakland's port create a specific fraud risk not present in most US cities?
The Port of Oakland processes enormous volumes of international cargo, and hundreds of local small businesses, independent importers, and logistics operators routinely receive time-sensitive cargo release and fee payment communications from multiple parties — freight brokers, terminal operators, customs brokers, and government agencies. This creates a normalized expectation of receiving payment requests from unfamiliar numbers related to port activity. Scammers exploit that expectation by inserting fraudulent payment demands into a communication flow where recipients are already conditioned to act quickly on cargo release notices.
Related Area Codes
- 510 — The original East Bay area code (1991) that 341 overlays. Oakland, Berkeley, Fremont, Hayward, and Richmond.
- 415 — San Francisco and Marin County. The 1947 code that 510 originally split from; cross-bay fraud campaigns frequently use both.
- 925 — Inland East Bay and Contra Costa County (Walnut Creek, Concord, Pleasanton). The code directly east of 341/510 territory.
Carriers & Network Type for 341 Numbers
Network mix: Mobile-heavy — most 341 numbers are assigned to mobile lines.
Common Scam Patterns
FCC complaint data for 341 numbers includes:
- Tech support scam
- Robocall/Auto-dialer
- Spoofed caller ID
- Credit card services
If You Got a Text from 341
Who Typically Calls from the 341 Area Code?
Area code 341 covers Oakland/Berkeley, California—one of North America's most forward-leaning telecommunications markets, where VoIP, hosted PBX, and app-based calling have largely displaced traditional wireline infrastructure. All national carriers—AT&T Mobility, Verizon Wireless, and T-Mobile USA—compete for subscribers alongside cloud communication platforms. Oakland and Berkeley anchor this high-density corridor, which operates on Pacific time. Calls from 341 numbers originate in Oakland/Berkeley, California. Residents, local businesses, schools, medical offices, and government agencies in this region all use 341 numbers. If you received an unexpected call or text from a 341 number, it may be a neighbor, a local service provider, or — in some cases — an unwanted solicitor.
Because 341 is a legitimate, widely used area code, scammers sometimes spoof it to make their calls appear local and trustworthy. This technique — called neighbor spoofing — makes it more likely that recipients will answer. A reverse phone lookup is the fastest way to find out whether a 341 number is genuinely local or spoofed.
Is a 341 Phone Number Spam?
Not all 341 calls are spam, but the area code is not immune to robocall campaigns and phone scams. Common complaints about 341 numbers include warranty extension scams, debt collection harassment, IRS impersonation calls, and unsolicited insurance offers.
If a 341 number called you and didn't leave a voicemail, that's a red flag — legitimate callers typically leave a message. Use Who Sent That Text Message to look up the number instantly and see whether other users have flagged it as spam.
You can also report a suspicious 341 number directly from our lookup results, helping protect others in the community from the same caller.
Look Up a 341 Number Now
Enter any 341 area code phone number below and get instant results — carrier, line type, caller name (where available), and spam reports submitted by real users.
Other Area Codes in California
California has multiple area codes serving different regions. If the number you received isn't from 341, check one of the other California area codes below.