Area code 415: where it is and who calls from it
Area code 415 is in California.
California (San Francisco, Daly City, Brisbane, and most of Marin County)
| Where | California |
|---|---|
| Time zone | Pacific Time ยท local time |
| In service since | 1947 |
| Overlay | Yes, with 628 |
| Prefixes assigned | 785 of 792 possible (99%) |
Overlay: 415 covers the same area as 628. Overlay areas use 10-digit dialing, so a seven-digit number alone won't connect, and neighbors can have different area codes.
Where 415 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 415, with how many prefixes each has.
Who holds 415 numbers
- Mobile carrier 24%
- Local phone company 43%
- Internet / business phone carrier 28%
- Paging service 3%
- Phone company 2%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| AT&T (local phone) | Local phone company | 329 | 42% |
| AT&T Mobility | Mobile carrier | 67 | 9% |
| Verizon Wireless | Mobile carrier | 48 | 6% |
| Level 3 (Lumen) | Internet / business phone carrier | 48 | 6% |
| T-Mobile (including Sprint) | Mobile carrier | 45 | 6% |
| MCImetro (Verizon Business) | Internet / business phone carrier | 44 | 6% |
| Onvoy | Internet / business phone carrier | 40 | 5% |
| Bandwidth | Internet / business phone carrier | 35 | 4% |
| MetroPCS (T-Mobile) | Mobile carrier | 22 | 3% |
| Spok | Paging service | 21 | 3% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number.
States served: California.
Other area codes in California
209 213 279 310 323 341 350 357 369 408 424 442 510 530 559 562 619 626 628 650 657 661 669 707 714 738 747 760 805 818 820 831 837 840 858 909 916 925 949 951
Got a call from 415?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 415 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.