---
title: "Area code 707: California, United States"
url: "https://lookvalid.com/area-code/707.md"
canonical_url: "https://lookvalid.com/area-code/707"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 707 serves California, United States. Number formats, numbering rules, a live phone validator and the other codes in California."
---

# Area code 707: California, United States

Area code 707 serves California, United States. Number formats, numbering rules, a live phone validator and the other codes in California.

NANPA lists 784 central office codes (prefixes) in use in area code 707, held by 35 holders across 75 rate centers.
Pacific Bell holds the most prefixes, 224 (29%). 79% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 3,529 complaints on file for 2,726 numbers in 707, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1959-01-01
- Time zone: Pacific (P)
- Assigned overlays: 369 (2023-02-01)
- Prefixes in use: 784
- Pooled prefixes: 616 (79%)
- Rate centers: 75
- Companies holding prefixes: 35
- Assignment dates on file: 2001-01-25 to 2024-02-20 (200 prefixes)
- ZIP codes in its places: 75

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| SANTA ROSA | 144 | 18% |
| FRFLD-SUIS | 56 | 7% |
| VALLEJO | 50 | 6% |
| NAPA | 43 | 5% |
| VACAVILLE | 37 | 5% |
| EUREKA | 35 | 4% |
| PTLM MAIN | 29 | 4% |
| UKIAH | 22 | 3% |
| 67 other rate centers | 368 | 47% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Pacific Bell | 224 | 29% |
| Onvoy | 95 | 12% |
| New Cingular Wireless PCS | 67 | 9% |
| Level 3 Communications | 58 | 7% |
| Verizon Wireless | 55 | 7% |
| T-Mobile USA | 31 | 4% |
| 29 other carriers | 254 | 32% |

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, named as the parent of 707 in the NANPA report, was in service.
- 1959-01-01: Area code 707 went into service.
- 2023-02-01: Area code 369 went into service as an overlay in the same area as 707.

## Nearest area codes

The area codes closest to 707, measured between the centers of the ZIP code places they serve, are 916 (about 87 miles), 415 (about 88 miles), 628 (about 88 miles), 530 (about 91 miles) and 279 (about 106 miles).

## ZIP codes

75 ZIP codes fall in places that have a rate center in this area code. The places with the most are Santa Rosa, CA (8 ZIP codes), Vallejo, CA (4 ZIP codes) and Eureka, CA (3 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

3,529 complaints for 2,726 numbers. Numbers whose latest complaint falls in each year:

- 2023: 164
- 2024: 156
- 2025: 143

## Questions

### Where is area code 707?

NANPA assigns area code 707 to California, United States.

### In which state does area code 707 sit?

California. 707 is one of 41 area codes the NANPA table assigns to the state.

### Which places does area code 707 cover?

The places with the most ZIP codes among the rate centers in 707 are Santa Rosa, CA, Vallejo, CA and Eureka, CA. The rate center list on this page shows all of them.

### Who owns area code 707?

NANPA assigns area codes. Within 707, Pacific Bell holds the most prefixes, 224 prefixes or 29%.

### Which time zone does 707 use?

The NANPA NPA report lists the time zone for 707 as Pacific (P).

### What year did 707 enter service?

The NANPA NPA report gives an in-service date of 1959-01-01, so 707 has been in use since 1959.

### Does area code 707 have an overlay?

Yes. 369 (in service 2023-02-01) shares the same area with 707, so numbers from all of them are local to each other.

### Which area codes are nearest to 707?

The area codes closest to 707, measured between the centers of the ZIP code places they serve, are 916 (about 87 miles), 415 (about 88 miles), 628 (about 88 miles), 530 (about 91 miles) and 279 (about 106 miles).

### How many prefixes does area code 707 have?

NANPA's report dated 2026-10-17 lists 784 prefixes in service in 707, spread over 75 rate centers and 35 holders.

### Are there complaints about 707 numbers?

The FCC data on file has 3,529 complaints for 2,726 numbers in 707. 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).