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Before You Call Back

Area code 341

Area code 341 serves California, including Fremont-Newark, Hayward and Oakland (Pacific time). It has been in service since July 22, 2019 and shares its area with 510.

Numbers starting with 341 drew 494 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 192 complaints to the FCC since November 2023. The number on your screen can be faked, so a 341 number proves nothing about where a call came from.

Location
CaliforniaSan Francisco-Oakland-Fremont, CA Metropolitan Statistical Area
Time zone
Pacific
In service since
July 22, 2019Created from 510
Overlay
Same area as 510
Local calls
Dial 1 + 10 digits
Exchanges in use
113 of 792held by 16 carriers
Projected to run out
2Q 2085NANPA forecast 2026.2

Complaints about 341 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 341. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

494

FCC complaints since November 2023

192

Different 341 numbers reported

638

FCC complaints naming a 341 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 20232
December 20234
January 20242
February 20243
March 20243
April 20243
May 20246
June 20246
July 20244
August 20246
September 20244
October 20241
November 20240
December 20245
January 20254
February 202514
March 20254
April 20254
May 20256
June 20258
July 20255
August 202510
September 20254
October 20250
November 20254
December 20250
January 20263
February 20261
March 20262
April 20265
May 20263
June 20263
July 202610
August 20267
September 202617
October 202616

What people said 341 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 368 of 494 reports were robocalls.

Show as a table
SubjectReports
Other190
Reducing your debt (credit cards, mortgage, student loans)186
Dropped call or no message37
Calls pretending to be government, businesses, or family and friends30
Medical and prescriptions13
Charities5

Most reported 341 numbers

Numbers with at least five reports from three or more places in the last twelve months. Many of them are likely spoofed.

Places served by 341

NANPA lists 13 rate centers for 341. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Fremont-Newark: Main DA16
  • Hayward13
  • Oakland: Berkeley DA12
  • Oakland: Fruitvale DA10
  • Richmond10
  • El Sobrante-Pinole9
  • Fremont-Newark: Greenleaf DA8
  • Fremont-Newark: Oliver DA8
  • Oakland: Main-Piedmont DA8
  • Oakland: Alameda DA7
  • Oakland: Trinidad DA6
  • Crockett3
  • Hercules-Rodeo3

Phone companies holding 341 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 99% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 16 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Fractel, LLC33
Onvoy, LLC - CA24
New Cingular Wireless PCS, LLC12
T-Mobile USA, Inc.12
Bandwidth.com CLEC, LLC - CA8
Cellco Partnership dba Verizon Wireless - CA5
Sonic Telecom, LLC - CA4
Commio, LLC2

When today's 341 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
20198
202014
202125
202219
202316
202418
20256
20266

Check a 341 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in California

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show