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341 Area CodeOakland, CA

Area code 341 covers Oakland and 32 other cities in California: 1,713,648 people in 2 counties, Alameda and Contra Costa, on Pacific Time (PT). It overlays 510.

Overview

Major City
Oakland
State
California (CA)
Timezone
Pacific Time (PT)
Current Time
–:––
Overlay
Yes – shares area with 510

Nearby Area Codes

Where is area code 341?

Overview of the 341 Area Code

Geographic Coverage of the 341 Area Code

All 33 cities

Oakland Area Codes Overview

What cities does area code 341 cover?

CityStatePopulationPopulation in 341% of listed-city population% of City
OaklandCA443,554443,55426.5%100.0%
FremontCA228,192228,19213.6%100.0%
HaywardCA158,440158,4409.5%100.0%
BerkeleyCA121,749121,7497.3%100.0%
RichmondCA115,353115,3536.9%100.0%
San LeandroCA86,57186,5715.2%100.0%
AlamedaCA78,79578,7954.7%100.0%
Union CityCA66,19666,1963.9%100.0%
Castro ValleyCA61,38861,3883.7%100.0%
NewarkCA46,25446,2542.8%100.0%
San PabloCA31,56231,5621.9%100.0%
HerculesCA26,49926,4991.6%100.0%
El CerritoCA26,40926,4091.6%100.0%
San LorenzoCA23,45223,4521.4%100.0%
AshlandCA21,92521,9251.3%100.0%
AlbanyCA19,43919,4391.2%100.0%
PinoleCA18,66318,6631.1%100.0%
CherrylandCA14,72814,7280.9%100.0%
EmeryvilleCA13,91213,9120.8%100.0%
El SobranteCA12,66912,6690.7%100.0%
PiedmontCA10,81610,8160.6%100.0%
FairviewCA10,00310,0030.6%100.0%
RodeoCA8,6798,6790.5%100.0%
Tara HillsCA5,1265,1260.3%100.0%
KensingtonCA5,0775,0770.3%100.0%
North RichmondCA3,7173,7170.2%100.0%
East Richmond HeightsCA3,2803,2800.2%100.0%
CrockettCA3,0943,0940.2%100.0%
RollingwoodCA2,9692,9690.2%100.0%
Montalvin ManorCA2,8762,8760.2%100.0%
BayviewCA1,7541,7540.1%100.0%
SunolCA91300.0%0.0%
Port CostaCA1901900.0%100.0%

City population is shown in full; each city's share inside 341 is measured from Census tract centroids.

What counties does area code 341 cover?

CountyStatePopulation in 341% of area-code footprint% of County
Alameda CountyCA1,443,26684%86%
Contra Costa CountyCA270,38216%23%
Sources:

Has area code 341 been reported for unwanted calls?

Yes – 473 FTC complaints, May 29 – Oct 1, 2026.

  • 66% robocalls
  • ↑ 52% vs prior period
  • FTC data, retrieved 2026-10-05

Most-reported subjects

  • Other43%205
  • Reducing your debt (credit cards, mortgage, student loans)25%117
  • Dropped call or no message12%55

Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints.

Which prefixes and exchanges belong to area code 341?

7% assigned to a telco

  • 86% Landline
  • 14% Wireless
  • 0% Unknown
PrefixUsageCarrier
(341)200-LandlineFractel
(341)201-LandlineTelnyx
(341)202-LandlineTeleport Communications America
(341)203-WirelessVerizon Wireless
(341)204-LandlineBandwidth.Com Clec
(341)205-LandlineBandwidth.Com Clec
(341)206-WirelessVerizon Wireless
(341)207-LandlineBandwidth.Com Clec
(341)208-WirelessNew Cingular Wireless Pcs
(341)209-LandlineBandwidth.Com Clec
(341)210-LandlineBandwidth.Com Clec
(341)212-LandlineTelnyx
(341)213-WirelessT-Mobile Usa
(341)214-WirelessNew Cingular Wireless Pcs
(341)215-LandlineBandwidth.Com Clec
(341)216-LandlineBandwidth.Com Clec
(341)217-LandlineBandwidth.Com Clec
(341)218-LandlineComcast Ip Phone
(341)219-LandlineTpx Communications
(341)220-LandlineTeleport Communications America
(341)221-WirelessT-Mobile Usa
(341)222-LandlineFractel
(341)223-LandlineCommio
(341)224-WirelessNew Cingular Wireless Pcs
(341)225-WirelessNew Cingular Wireless Pcs
(341)226-LandlineFractel
(341)227-WirelessNew Cingular Wireless Pcs
(341)228-WirelessVerizon Wireless
(341)234-LandlineFractel
(341)241-LandlineOnvoy
(341)299-LandlineFractel
(341)300-LandlineFractel
(341)314-LandlineOnvoy
(341)333-LandlineFractel
(341)336-LandlineFractel
(341)342-LandlineOnvoy
(341)344-LandlineSonic Telecom
(341)345-LandlineFractel
(341)348-LandlineFractel
(341)356-LandlineFractel
(341)386-LandlineFractel
(341)388-LandlineFractel
(341)400-LandlineFractel
(341)420-LandlineSonic Telecom
(341)441-LandlineSonic Telecom
(341)444-LandlineFractel
(341)465-LandlineFractel
(341)500-LandlineFractel
(341)512-LandlineSonic Telecom
(341)529-LandlineFractel
(341)587-LandlineFractel
(341)600-LandlineFractel
(341)666-LandlineFractel
(341)667-LandlineFractel
(341)688-LandlineTon80 Communications
(341)699-LandlineFractel
(341)732-LandlineFractel
(341)758-LandlineFractel
(341)766-LandlineFractel
(341)777-LandlineWide Voice
(341)786-LandlineFractel
(341)799-LandlineFractel
(341)800-LandlineFractel
(341)837-LandlineTon80 Communications
(341)888-LandlineWide Voice
(341)895-LandlineTwilio International
(341)899-LandlineFractel
(341)900-LandlineFractel
(341)946-LandlineFractel
(341)999-LandlineFractel

Frequently Asked Questions about the 341 Area Code

Who called me from a 341 number?

14% of its assigned prefixes are wireless. Largest holders: Fractel, Bandwidth.Com Clec, and New Cingular Wireless Pcs.

Is 341 a scam area code?

Carriers hold 7% of its possible prefixes.

Why do I keep getting calls from the 341 area code?

Complaints rose 52% on the prior period.

Should I answer an unknown 341 number?

66% of its FTC complaints were robocalls. Its most-reported specific subject was "Reducing your debt (credit cards, mortgage, student loans)", at 25%.

How do I block calls from the 341 area code?

Blocking 341 still lets 510 numbers through.

Where is area code 341?

341 covers 33 cities and 1,713,648 residents in Alameda and Contra Costa counties, California.

When did area code 341 go into service?

341 went into service on July 22, 2019. It was added to overlay 510.

Is 341 a real area code?

Yes: 15 carriers hold its prefixes, serving 33 cities in Alameda and Contra Costa counties.

What timezone is the 341 area code in?

341 is on Pacific Time (PT).

How do I call a 341 number from abroad?

Dial +1 341, then the number.

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