341 Phone Number Lookup: Oakland, CA

The 341 area code is a telephone area code serving much of the East Bay in California. Look up any phone number starting with 341 area code.

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California Phone Number Lookup / 341

Most Common Area Code 341 Scams

Numbers with the 341 area code are generating unsolicited political surveys and silent voicemails. These calls are often data mining attempts or robocalls checking to see if your number is active.

Unsolicited Political Surveys

Callers from the 341 area code claim to be a "Research Company" conducting political surveys. They start by saying "We are not selling anything" and identify vaguely as a "Research Company" without giving a specific name. These unsolicited calls ask for your personal opinions on political matters. They use your responses to build marketing lists or pivot into sales pitches. Legitimate polling firms identify themselves clearly with specific company names.

"We are not selling anything; We are a Research Company which conducts in Political Surveys, we only want your opinions."

Silent or Garbled Voicemails

Numbers in the 341 area code leave voicemails that are either completely silent for up to one minute or are faint, distorted, and unintelligible. These calls come from unknown numbers you do not recognize. The automated systems use these calls to check if your phone number is active. If you answer or call back, it signals that your number is valid and leads to more spam calls.

"left a 1min voice message of 'air'"

Recently Reported Area Code 341 Spam Calls

Area Code 341 phone numbers reported as unwanted calls to the FTC in the last 30 days.

(341) 200-6589

16 reports ·

(341) 204-9370

5 reports ·

(341) 336-2336

3 reports ·

(341) 786-7965

2 reports ·

(341) 400-0075

1 report ·

(341) 900-1490

1 report ·

(341) 201-3662

1 report ·

(341) 200-9183

1 report ·

(341) 336-8976

1 report ·

(341) 200-9298

1 report ·

Is area code 341 a scam?

No, 341 is a legitimate California area code serving the East Bay, including Oakland and Berkeley. Scammers spoof it to appear local to Bay Area residents while bypassing filters that haven't fully cataloged the newer overlay.

Why do I get spam calls from area code 341?

Unsolicited political survey calls that open with "we are not selling anything" before gathering opinion data to build marketing lists are highly documented. Silent or "dead air" voicemails that run for up to a minute without audio are also used to verify active numbers.

Where Is Area Code 341 Located?

Area code 341 covers the western East Bay region of California. Specifically, it includes portions of Contra Costa and Alameda Counties.

Counties Served:

  • Alameda County
  • Contra Costa County

Major Cities:

  • Oakland
  • Berkeley
  • Hayward
  • Fremont
  • Richmond

Other Cities and Towns:

  • Alameda
  • Albany
  • Ashland
  • Bayview
  • Canyon
  • Castro Valley
  • Cherryland
  • Crockett
  • East Richmond Heights
  • El Cerrito
  • El Sobrante
  • Emeryville
  • Fairview
  • Hercules
  • Kensington

Overlay System

Area code 341 is an overlay to area code 510 . This means that both area codes serve the same geographic region. Area code 510 was established in 1991, and area code 341 was introduced later. Ten-digit dialing is mandatory in this area.

Area Code 341 Location Map

Area Code 341 Location on California Map

Area code 341 is a general purpose code which was placed in service on July 22, 2019.

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