341 area code — Fremont-newark:main Da, CA geographic
- State
- California
- Major area
- Fremont-newark:main Da
- Time zone
- Pacific
- In service since
- 2019-07-22
- Split from
- 510
- Overlay complex
- 341 / 510
- Active prefixes
- 107
- Rate centers
- 13
- Carriers
- 16
- Projected exhaust
- 4Q 2073
The 341 area code covers Fremont-newark:main Da, California, Pacific time zone, and dates back to July 22, 2019. It is part of the 341/510 overlay complex — these codes share the same territory. Note that porting and VoIP mean a 341 number can be used from anywhere — the code marks where the number was assigned.
107 central-office prefixes are currently active in this code, spread across 16 code-holding carriers. Thousands-block pooling applies to 106 prefixes, so a single prefix can belong to several carriers. Its prefixes map to 13 distinct rate centers.
NANPA projects numbering capacity for the 341/510 complex to exhaust in 4Q 2073.
Dialing: 1+10D locally, 1+10D to other codes.
To check where a specific 341 number was issued, look up its six-digit prefix; to check who is actually calling, ignore the display and verify through an official callback number — caller ID is assertable and routinely spoofed.
341 was created from 510 in 2019.
Largest localities in 341
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Fremont-newark:main Da | 15 | 510 |
| Hayward | 12 | 510 |
| Oakland:berkeley Da | 11 | 510 |
| Richmond | 10 | 510 |
| Oakland:fruitvale Da | 10 | 510 |
| El Sobrante-pinole | 9 | 510 |
| Oakland:main-piedmont Da | 8 | 510 |
| Fremont-newark:greenleaf Da | 8 | 510 |
| Fremont-newark:oliver Da | 7 | 510 |
| Oakland:alameda Da | 6 | 510 |
FAQ
Will 341 run out of numbers?
NANPA's current forecast projects exhaust in 4Q 2073 — decades of capacity remain.
Why am I getting spam calls from 341 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 341 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 341 number from?
341 is assigned to Fremont-newark:main Da and surrounding areas of California in the Pacific time zone. The three digits after the area code (the prefix) narrow it down to a rate center.