341 Phone Number Lookup

Who Calls From the 341 Area Code?

An overlay for the East Bay region, 341 shares coverage with 510 across Oakland, Berkeley, and Fremont. Look for calls from UC Berkeley administrative offices, Tesla's Fremont HR team, and Kaiser Permanente headquarters.

341 Phone Numbers Recently Reported as Spam

341 area code numbers reported as unwanted calls to the FTC in the last 30 days.

Phone Number	Complaints	Last Reported
(341) 208-5217	2	May 11, 2026
(341) 333-3930	2	May 6, 2026
(341) 229-3679	1	May 18, 2026
(341) 999-4657	1	May 17, 2026
(341) 209-9047	1	May 17, 2026
(341) 400-4211	1	May 15, 2026
(341) 699-0048	1	May 14, 2026
(341) 238-8843	1	May 14, 2026
(341) 223-4461	1	May 14, 2026
(341) 667-8065	1	May 13, 2026

Common Area Code 341 Phone 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.

• Political Surveys
• Silent Voicemails

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'"

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.

FAQs About 341 Phone Numbers

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.

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