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Area Code 341

Area code 341 is in California, USA , spanning 2 counties and serving 23 cities, including Oakland, Berkeley or Richmond; it currently uses 103 prefixes, assigned from 341-200-XXXX through 341-999-XXXX.

In service since July 22, 2019, area code 341 is an overlay Numbering Plan Area, part of overlay complex 510/341.

The current local time is .

341 area code location on a map
© OpenStreetMap contributors
For exact NPA boundaries see official 341 area code map

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Locate any 341-NXX prefix:

NPANXX Area Served1 Date2
341-200 Hercules/ Rodeo 7/2/2020
341-201 Fremont/ Newark 12/17/2020
341-202 Oakland [Main/ Piedmont] 7/7/2021
341-203 Richmond 7/29/2021
341-204 Fremont/ Newark 10/28/2021
341-205 Oakland [Main/ Piedmont] 8/31/2021
341-206 Fremont/ Newark 10/15/2021
341-207 Richmond 10/26/2021
341-208 Hayward 10/26/2021
341-209 Fremont/ Newark 1/10/2022
341-210 Oakland [Alameda] 9/27/2021
341-212 Oakland [Berkeley] 11/21/2021
341-213 Oakland [Main/ Piedmont] 1/10/2022
341-214 Hercules/ Rodeo 4/12/2022
341-215 Richmond 2/4/2022
341-216 Fremont/ Newark 2/22/2022
341-217 Oakland [Alameda] 9/2/2022
341-218 Oakland [Fruitvale] 10/10/2022
341-219 Oakland [Berkeley] 6/3/2022
341-220 Oakland [Main/ Piedmont] 9/19/2022
341-221 Hayward 2/28/2022
341-222 Oakland [Fruitvale] 12/3/2019
341-223 Oakland [Alameda] 11/3/2022
341-224 Fremont/ Newark 12/12/2022
341-225 Freemont/ Newark [Greenleaf] 02/16/2023
341-226 Oakland [Fruitvale] 5/28/2020
341-227 Fremont/ Newark [Oliver] 02/16/2023
341-228 Fremont/ Newark 02/17/2023
341-229 Oakland [Main/ Piedmont] 03/30/2023
341-230 Richmond 04/12/2023
341-231 El Sobrante/ Pinole 05/08/2023
341-232 Hayward 05/12/2023
341-233 Fremont/ Newark 06/13/2023
341-234 Oakland [Alameda] 1/13/2021
341-235 Freemont/ Newark [Greenleaf] 08/04/2023
341-236 Fremont/Newark [Oliver] 08/04/2023
341-237 Oakland [Berkeley] 08/17/2023
341-238 Oakland [Fruitvale] 08/17/2023
341-239 Oakland [Alameda] 09/19/2023
341-240 Hayward 11/01/2023
341-241 Hayward 7/13/2022
341-242 Richmond 11/08/2023
341-243 Hercules/ Rodeo 12/21/2023
341-244 Oakland [Trinidad] 01/23/2024
341-245 Hayward 01/24/2024
341-246 Fremont/ Newark [Oliver] 02/07/2024
341-247 Richmond 02/07/2024
341-248 Freemont/ Newark [Greenleaf] 02/07/2024
341-249 Freemont/ Newark [Greenleaf] 02/20/2024
341-250 Oakland [Fruitvale] 03/18/2024
341-251 El Sobrante/ Pinole 03/27/2024
341-252 Fremont/ Newark 05/31/2024
341-253 Oakland [Berkeley] 06/18/2024
341-254 Oakland [Berkeley] 09/09/2024
341-255 Oakland [Berkeley] 09/10/2024
341-256 Oakland [Fruitvale] 09/12/2024
341-257 Fremont/ Newark 10/10/2024
341-258 Hayward 10/15/2024
341-259 El Sobrante/ Pinole 11/14/2024
341-260 Hayward 12/06/2024
341-261 Freemont/ Newark [Greenleaf] 01/02/2025
341-262 Hayward 01/13/2025
341-299 Oakland [Trinidad] 4/18/2021
NPANXX Area Served1 Date2
341-300 Richmond 9/17/2020
341-314 El Sobrante/ Pinole 12/7/2020
341-333 Oakland [Berkeley] 8/21/2019
341-336 Fremont/ Newark 5/28/2020
341-341 Fremont/Newark [Oliver] 09/20/2024
341-342 Fremont/Newark [Oliver] 7/8/2022
341-344 Oakland [Trinidad] 11/19/2021
341-345 Fremont/ Newark 2/16/2021
341-348 Fremont/ Newark 4/18/2021
341-356 Fremont/ Newark 5/28/2020
341-386 Hayward 4/18/2021
341-388 Richmond 4/18/2021
NPANXX Area Served1 Date2
341-400 Oakland [Fruitvale] 9/16/2020
341-420 Oakland [Fruitvale] 10/28/2021
341-441 Oakland [Main/ Piedmont] 1/14/2022
341-444 Crockett 12/3/2019
341-465 Fremont/ Newark 12/28/2020
NPANXX Area Served1 Date2
341-500 El Sobrante/ Pinole 1/4/2021
341-512 Oakland [Berkeley] 9/1/2022
341-529 Fremont/ Newark 9/16/2020
341-587 Fremont/ Newark 8/23/2021
NPANXX Area Served1 Date2
341-600 El Sobrante/ Pinole 8/25/2020
341-666 Oakland [Trinidad] 12/30/2019
341-667 Oakland [Fruitvale] 7/7/2021
341-688 Oakland [Berkeley] 2/18/2022
341-699 Oakland [Main/ Piedmont] 9/16/2021
NPANXX Area Served1 Date2
341-732 El Sobrante/ Pinole 7/7/2021
341-758 Oakland [Fruitvale] 4/18/2021
341-766 Oakland [Berkeley] 5/28/2020
341-777 Hayward 5/31/2019
341-786 Fremont/ Newark 2/22/2022
341-799 Richmond 5/27/2020
NPANXX Area Served1 Date2
341-800 Hayward 12/3/2019
341-837 El Sobrante/ Pinole 1/10/2022
341-888 Fremont/ Newark 6/7/2019
341-895 Oakland [Alameda] 8/27/2020
341-899 Oakland [Trinidad] 9/15/2021
NPANXX Area Served1 Date2
341-900 Crockett 11/13/2020
341-946 Oakland [Berkeley] 2/22/2021
341-999 Richmond 7/22/2019
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date.
  3. NXX prefixes last updated: March 1st, 2025

Cities in area code 341

City1 County Time Zone2
Alameda Alameda P
Albany Alameda P
Berkeley Alameda P
Castro Valley Alameda P
Crockett Contra Costa P
El Cerrito Contra Costa P
El Sobrante Contra Costa P
Emeryville Alameda P
Fremont Alameda P
Hayward Alameda P
Hercules Contra Costa P
Knightsen Contra Costa P
Newark Alameda P
Oakland Alameda P
Piedmont Alameda P
Pinole Contra Costa P
Port Costa Contra Costa P
Richmond Contra Costa P
Rodeo Contra Costa P
San Leandro Alameda P
San Lorenzo Alameda P
San Pablo Contra Costa P
Union City Alameda P
  1. Listed above are most places served by USA area code 341. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. P stands for Pacific Time (currently ).
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