--- title: "Area code 415: California, United States" url: "https://lookvalid.com/area-code/415.md" canonical_url: "https://lookvalid.com/area-code/415" last_updated: "2026-10-23" type: "reference" summary: "Area code 415 serves California, United States. Number formats, numbering rules, a live phone validator and the other codes in California." --- # Area code 415: California, United States Area code 415 serves California, United States. Number formats, numbering rules, a live phone validator and the other codes in California. NANPA lists 785 central office codes (prefixes) in use in area code 415, held by 32 holders across 14 rate centers. The largest rate center is SNFC CNTRL, with 483 prefixes (62%). Pacific Bell holds the most prefixes, 326 (42%). 63% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 6,223 complaints on file for 4,201 numbers in 415, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - 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 | 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% | ## Carriers | 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. ## History - 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. ## Nearest area codes 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). ## ZIP codes 16 ZIP codes fall in places that have a rate center in this area code. The places with the most are Novato, CA (5 ZIP codes), San Rafael, CA (5 ZIP codes) and Mill Valley, CA (2 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes. ## Complaints on file 6,223 complaints for 4,201 numbers. Numbers whose latest complaint falls in each year: - 2023: 179 - 2024: 150 - 2025: 133 ## Questions ### 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. Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).