Area code
415
415 is a United States area code. Under the North American Numbering Plan it belongs to California, which has 41 area codes in total.
Validate a number in 415
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
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Area code 415 at a glance
NANPA lists 785 central office codes (prefixes) in use in area code 415, held by 32 holders across 14 rate centers.
| Fact | Value |
|---|---|
| In service since | 1947-01-01 |
| Time zone | Pacific (P) |
| Assigned overlays | 628 (2015-03-21) |
| Prefixes in use | 785 |
| Pooled prefixes | 495 (63%) |
| Rate centers | 14 |
| Companies holding prefixes | 32 |
| Assignment dates on file | 2001-01-25 to 2026-07-22 (150 prefixes) |
| ZIP codes in its places | 16 |
Rate centers in area code 415
The largest rate center is SNFC CNTRL, with 483 prefixes (62%).
| Rate center | Prefixes | Share |
|---|---|---|
| SNFC CNTRL | 483 | 62% |
| SAN RAFAEL | 62 | 8% |
| SNFC MT-EV | 61 | 8% |
| SNFC JUNPR | 56 | 7% |
| NOVATO | 21 | 3% |
| SAUSALITO | 18 | 2% |
| MILLVALLEY | 16 | 2% |
| BELVEDERE | 15 | 2% |
| 6 other rate centers | 53 | 7% |
Who holds the prefixes in 415
Pacific Bell holds the most prefixes, 326 (42%). 63% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Pacific Bell | 326 | 42% |
| New Cingular Wireless PCS | 67 | 9% |
| Verizon Wireless | 48 | 6% |
| T-Mobile USA | 45 | 6% |
| Mcimetro Access Transmission Services | 44 | 6% |
| Onvoy | 40 | 5% |
| 26 other carriers | 215 | 27% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 415
- 1947-01-01 Area code 415 went into service.
- 1958-01-01 Area code 209 went into service and names 415 as its parent.
- 1959-01-01 Area code 408 went into service and names 415 as its parent.
- 1959-01-01 Area code 707 went into service and names 415 as its parent.
- 1991-09-02 Area code 510 went into service and names 415 as its parent.
- 1997-08-02 Area code 650 went into service and names 415 as its parent.
- 2015-03-21 Area code 628 went into service as an overlay in the same area as 415.
Area codes nearest to 415
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
ZIP codes in area code 415
16 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Novato, CA | 5 |
| San Rafael, CA | 5 |
| Mill Valley, CA | 2 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 415 numbers
6,223 FCC complaints are on file for 4,201 numbers in 415, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 179 |
| 2024 | 150 |
| 2025 | 133 |
Other area codes in California
California is one state with 41 area codes in the NANPA table. 415 is one of them.
- 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
Next to 415 in the numbering table
These are the codes just before and after 415 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 415 was first assigned in California. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in California next to a 415 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 415
Where is area code 415?
NANPA assigns area code 415 to California, United States.
In which state does area code 415 sit?
California. 415 is one of 41 area codes the NANPA table assigns to the state.
Which places does area code 415 cover?
The places with the most ZIP codes among the rate centers in 415 are Novato, CA, San Rafael, CA and Mill Valley, CA. The rate center list on this page shows all of them.
Who owns area code 415?
NANPA assigns area codes. Within 415, Pacific Bell holds the most prefixes, 326 prefixes or 42%.
Which time zone does 415 use?
The NANPA NPA report lists the time zone for 415 as Pacific (P).
What year did 415 enter service?
The NANPA NPA report gives an in-service date of 1947-01-01, so 415 has been in use since 1947.
Does area code 415 have an overlay?
Yes. 628 (in service 2015-03-21) shares the same area with 415, so numbers from all of them are local to each other.
Which area codes are nearest to 415?
The area codes closest to 415, measured between the centers of the ZIP code places they serve, are 341 (about 25 miles), 510 (about 25 miles), 925 (about 35 miles), 650 (about 42 miles) and 669 (about 66 miles).
How many prefixes does area code 415 have?
NANPA's report dated 2026-10-17 lists 785 prefixes in service in 415, spread over 14 rate centers and 32 holders.
Are there complaints about 415 numbers?
The FCC data on file has 6,223 complaints for 4,201 numbers in 415. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.