341 area code
Oakland area, Pacific Time.Area code 341 covers Oakland, Fremont-Newark, Hayward and 4 more places in California, on Pacific Time. 510 covers the same area.
Right now in Oakland
Pacific Time (PST, UTC-8; PDT, UTC-7 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 341 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 341 has 7. Each one's share is how many 341 numbers start there. Its biggest metro area is San Francisco-Oakland-Fremont, CA.
- Oakland38%
- Fremont-Newark28%
- Hayward11%
- Richmond9%
- El Sobrante-Pinole8%
- Hercules-Rodeo3%
- Crockett3%
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 341 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 341 number to them, since you can't tell a work line from a personal cell.
What applies to 341Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
341 and 510
341 went into service on July 22, 2019. 341 and 510 cover the same area, so new numbers can get either code and neighbors can have different area codes. 341 holds 12% of the area's exchanges; 510 holds the most. Local calls take all 10 digits.
- 1991510 overlay
- 2019341 starts
Source: NANPA area code database
Other California area codes
All California area codes- Stockton209350
- Los Angeles213323738
- Sacramento279916
- Compton310424
- Fresno357559
- Santa Rosa369707
- San Jose408669
- San Francisco415628
- Oceanside442760
- Chico530837
- Long Beach562
- San Diego619858
- Alhambra626
- Palo Alto650
- Anaheim657714
- Bakersfield661
- Van Nuys747818
- Santa Barbara805820
- Salinas831
- Ontario840909
- Walnut Creek925
- Irvine949
- Riverside951
Calling a list of 341 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
341 area code FAQ
What area code is 341?
341 is a California area code for Oakland, Fremont-Newark, Hayward, Richmond and 3 more places.
What time zone is the 341 area code in?
Pacific Time (PST, UTC-8; PDT, UTC-7 in summer).
Is 510 the same as 341?
Same area, different code. 341 and 510 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 341 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 341 area code start?
On July 22, 2019.
Calling 341 numbers? Reach more of them.
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