707 Area Code — California
707 is a North American Numbering Plan area code for California, the United States. It covers about 1,358,298 people in 138 towns and 165 ZIP codes, including Santa Rosa, Vallejo and Fairfield.
| Field | Value |
|---|---|
| Area code | 707 |
| Country | United States (+1) |
| State / province | California |
| Type | Shares its towns with 369 |
| Time zone | Pacific |
| Population covered | 1,358,298 |
| Towns covered | 138 |
| ZIP codes | 165 |
| Approx. centre | 39.199, -123.117 |
Where area code 707 is used
Area code 707 is assigned to California, the United States, inside the North American Numbering Plan. Numbers in the code are written (707) NXX-XXXX at home and +1 707 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Other area codes in this footprint: 369. They serve towns in the same territory, so a single street can contain numbers from more than one code. That is normal in the NANP and does not change how you dial.
Towns and cities in area code 707
The 138 towns below are the largest in the 707 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Santa Rosa | Sonoma County | 210,074 | 8 |
| Vallejo | Solano County | 126,360 | 4 |
| Fairfield | Solano County | 120,008 | 2 |
| Vacaville | Solano County | 109,591 | 3 |
| Napa | Napa County | 91,371 | 3 |
| Petaluma | Sonoma County | 71,359 | 6 |
| Eureka | Humboldt County | 47,944 | 3 |
| Rohnert Park | Sonoma County | 46,829 | 3 |
| Sonoma | Sonoma County | 35,196 | 1 |
| Ukiah | Mendocino County | 33,164 | 1 |
| Sebastopol | Sonoma County | 28,747 | 2 |
| Windsor | Sonoma County | 27,429 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Sonoma County | 50 |
| Humboldt County | 34 |
| Mendocino County | 28 |
| Solano County | 15 |
| Lake County | 15 |
| Napa County | 11 |
| Del Norte County | 6 |
| Marin County | 4 |
| Trinity County | 2 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 707
- Within North America: 707 + 7-digit number (707-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 707, then the 7-digit number — for example 00 1 707 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 707?
707 is a North American Numbering Plan area code assigned to California, the United States. It covers about 1,358,298 people in 138 towns.
Is 707 a US or Canadian area code?
707 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 707 in?
Area code 707 is in the Pacific time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.