Area code 707
Where 707 is, how it is dialed, which carriers hold its numbers and how many of its codes are in use, from NANPA's 10/01/2026 files.
- State
- CA
- In service
- 1959
- Assigned codes
- 785of 800 possible
- Carriers
- 36
Area code 707 at a glance
Area code 707 is a geographic area code in California, in service since January 1, 1959, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 707 and 369 cover the same territory, so neighbors on the same street can have different area codes. It is in the Pacific time zone. The places with the most assigned exchanges include Santa Rosa, Vallejo, Napa, Vacaville, and Eureka. By population, its largest named places are Santa Rosa, Vallejo, Vacaville, Napa, and Benicia.
| Item | Value |
|---|---|
| State | California |
| In service since | January 1, 1959 |
| Overlay | Yes, with 369 |
| Parent area code (NANPA) | 415 |
| Time zone | Pacific |
| Local calls within the code | 1 plus ten digits |
| Assigned central office codes | 785 |
| Rate centers with codes | 75 |
| Carriers holding codes | 36 |
| Pooled codes | 617 |
| Codes assigned since 2020 | 52 |
| Relief planning in progress | No |
Source: NANPA NPA report and utilized central office code file, both dated 10/01/2026.
Where 707 numbers are local
707 holds 3.6% of the 22,087 central office codes assigned in California, the 12th most of the state's 41 codes. 28 Census places could be matched to rate centers with 707 exchanges; the most populous are Santa Rosa (178,000), Vallejo (123,000), Vacaville (104,000), and Napa (76,921). For a storefront or service area inside 707, the place pages show which prefixes are rated local there.
| Place | Population (2024) | Area codes | Exchanges | Carriers |
|---|---|---|---|---|
| Santa Rosa, CA | 177,524 | 369, 707 | 154 | 26 |
| Vallejo, CA | 123,475 | 369, 707 | 51 | 15 |
| Vacaville, CA | 103,994 | 369, 707 | 38 | 12 |
| Napa, CA | 76,921 | 369, 707 | 44 | 16 |
| Benicia, CA | 26,477 | 369, 707 | 23 | 11 |
| Windsor, CA | 25,846 | 369, 707 | 11 | 7 |
| Eureka, CA | 25,412 | 369, 707 | 38 | 15 |
| Dixon, CA | 20,296 | 369, 707 | 10 | 9 |
| Arcata, CA | 18,748 | 369, 707 | 11 | 4 |
| Ukiah, CA | 16,067 | 369, 707 | 23 | 10 |
| Fortuna, CA | 12,114 | 369, 707 | 6 | 5 |
| Healdsburg, CA | 11,231 | 369, 707 | 10 | 6 |
| Sonoma, CA | 10,606 | 369, 707 | 18 | 11 |
| Rio Vista, CA | 10,248 | 707 | 5 | 4 |
| Cloverdale, CA | 8,784 | 707 | 6 | 5 |
Population: Census Vintage 2024 estimates for the matched place. Exchanges and carriers: NANPA utilized code file.
How calls are dialed in 707
According to NANPA's dialing-plan data, local calls within 707 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere.
Phone companies in area code 707
36 carriers hold the 785 central office codes assigned in 707. Pacific Bell has the most, with 224 (29%). 617 of the codes (79%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Pacific Bell | 224 | 29% |
| Onvoy, LLC - CA | 96 | 12% |
| New Cingular Wireless PCS, LLC | 67 | 8.5% |
| Level 3 Communications, LLC - CA | 58 | 7.4% |
| Cellco Partnership d/b/a Verizon Wireless - CA | 55 | 7.0% |
| T-mobile USA, INC. | 31 | 3.9% |
| Metropcs, INC. | 28 | 3.6% |
| Teleport Communications America, LLC - CA | 24 | 3.1% |
| Bandwidth.com CLEC, LLC - CA | 24 | 3.1% |
| Mcimetro Access Transmission Services LLC | 21 | 2.7% |
| United States Cellular - CA | 19 | 2.4% |
| Ip Horizon LLC | 17 | 2.2% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
Local calling areas in 707
NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 707 has codes in 75 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.
| Rate center (NANPA) | Place | Codes |
|---|---|---|
| SANTA ROSA | Santa Rosa, CA | 144 |
| FRFLD-SUIS | not matched | 56 |
| VALLEJO | Vallejo, CA | 50 |
| NAPA | Napa, CA | 43 |
| VACAVILLE | Vacaville, CA | 37 |
| EUREKA | Eureka, CA | 36 |
| PTLM MAIN | not matched | 29 |
| UKIAH | Ukiah, CA | 22 |
| BENICIA | Benicia, CA | 21 |
| SONOMA | Sonoma, CA | 16 |
| ST HELENA | St. Helena, CA | 12 |
| PTLM SWIFT | not matched | 12 |
| LAKEPORT | Lakeport, CA | 11 |
| YOUNTVILLE | Yountville, CA | 10 |
| WINDSOR | Windsor, CA | 10 |
| LOWER LAKE | not matched | 10 |
| FORT BRAGG | Fort Bragg, CA | 10 |
| ARCATA | Arcata, CA | 10 |
| SEBASTOPOL | Sebastopol, CA | 9 |
| DIXON | Dixon, CA | 8 |
| CRESCENTCY | Crescent City, CA | 8 |
| WILLITS | Willits, CA | 8 |
| HEALDSBURG | Healdsburg, CA | 8 |
| GARBERVL | not matched | 6 |
| KELSEYVL | not matched | 6 |
Top 25 of 75 rate centers.
How full is area code 707?
An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 785 are assigned in 707, 98% of 800. 52 were assigned in 2020 or later.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 53 | 26% |
| 2010s | 96 | 48% |
| 2020s | 52 | 26% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Getting a 707 number for your business
Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.
If you already have a number in area code 707, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.
Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.
Frequently asked questions
Where is area code 707?
707 is a geographic area code in California. Places with the most assigned exchanges include Santa Rosa, Vallejo, Napa, and Vacaville.
What time zone is area code 707 in?
NANPA lists 707 in the Pacific time zone.
When did area code 707 go into service?
NANPA records an in-service date of January 1, 1959.
Is 707 an overlay area code?
Yes. It shares its territory with 369.
Can my business get a 707 phone number?
Callata includes up to 3 local numbers on its $99/month plan (5 users included). Which 707 numbers are open depends on carrier inventory when you choose, and you can port an existing number for free.