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Area code 341

Area code 341 Oakland, California

Area code 341 is one of the newer area codes, added in 2019 to California, with numbers assigned in Oakland, Franklin, Hayward and 4 more places. It’s 9:11 PM there now.

State
California41 area codes in California
Time zone
Pacific9:11 PM there now
Exchanges
1137 places
Overlay
510Same area, 10-digit dialing
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Where area code 341 is

Numbers in 341 are assigned to 7 places in 4 counties: Alameda County, Sacramento County, Contra Costa County and Riverside County.

Oakland has the most, 38% of the exchanges; the rest are spread across 6 other places.

  • Oakland43
  • Franklin32
  • Hayward13
  • Richmond10
  • El Sobrante9
  • Hercules3
  • Crockett3

Phone companies in 341

113 blocks of numbers in 341 are held by 16 phone companies. The most belong to Fractel (33), Inteliquent (24) and AT&T Mobility (12).

A large share, about 72%, belongs to competitive and internet phone carriers; wireless networks hold 26% and local phone and cable companies 3%.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

341 went into service in 2019, added to the area of 510.

510 (since 1991) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.

90 new exchanges were assigned since 2021, the latest in September 2026.

Calling 341

It’s 9:11 PM Pacific time in 341 right now.

From elsewhere in the U.S., dial 1, 341 and the 7-digit number; inside the area, all 10 digits too.

Nearby area codes

California has 41 area codes: 209, 213, 279, 310, 323, 341, 350, 357, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 840, 858, 909, 916, 925, 949 and 951.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 341 area code

Map of the 341 area code around Oakland, Franklin and Hayward, California.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 341

Where is area code 341?

In California, covering Oakland, Franklin and Hayward and other places across 4 counties.

What time zone is 341 in?

Pacific time. It was 9:11 PM there when this page loaded.

Is 341 an overlay?

Yes. 510 serves the same area, so dial all 10 digits for local calls.

Which phone companies have 341 numbers?

16 companies hold blocks; the most belong to Fractel, Inteliquent and AT&T Mobility. About 26% of blocks are wireless.

Is 341 running out of numbers?

Not on record. 90 new exchanges have been assigned since 2021.