Introduction
The 707 area code belongs to northwestern California: the wine valleys of Napa and Sonoma, the Solano County cities of Vallejo, Fairfield and Vacaville, and the North Coast through Mendocino and Humboldt counties up to Crescent City. Since February 1, 2023, a second code, 369, has been issued across the same territory.
Most people look up 707 after a call from a number they don't recognize. Below you'll find the counties and cities it covers, its time zone, how 369 came to share the region, what to check before trusting a caller, how to dial, and how a business can get a local number.
- 707 serves all or part of 11 counties, including Sonoma, Napa, Solano, Mendocino, Humboldt and Del Norte, with cities such as Santa Rosa, Napa, Vallejo, Eureka and Ukiah.
- It was split from 415 in 1959. The 369 overlay took effect on February 1, 2023, and no existing number changed.
- Local calls have required 1 + area code + number since October 24, 2021.
- The region is on Pacific Time, and the area code alone says nothing about who is calling.
Where Is the 707 Area Code?
The 707 area code sits north of San Francisco Bay. Its southern end takes in Sonoma, Napa and Solano counties, the part of the Bay Area known as the North Bay, and it runs north along the coast through Mendocino, Humboldt and Del Norte counties. Inland it covers Lake County and portions of Glenn, Tehama and Trinity counties, plus part of Marin County.
San Francisco is not part of it. In 1959, 707 was split off from the 415 area code, which kept San Francisco. The two codes still border each other, but a 707 number points north of the Golden Gate.
The CPUC counts 75 rate centers inside 707, the local serving areas phone companies use to decide which calls are local. That detail explains the limits of an area code lookup: 707 pins a number to a region of northwestern California, not to a single town or street.
Cities and Counties in the 707 Area Code
The California Public Utilities Commission (CPUC) publishes a list of cities in the 707 and 369 region. Grouped by county, it looks like this:
| County | Cities on the CPUC list |
|---|---|
| Sonoma | Santa Rosa, Petaluma, Rohnert Park, Windsor, Healdsburg, Sebastopol, Sonoma, Cotati, Cloverdale |
| Napa | Napa, American Canyon, Calistoga, St. Helena, Yountville |
| Solano | Vallejo, Fairfield, Vacaville, Benicia, Suisun City, Dixon, Rio Vista |
| Lake | Clearlake, Lakeport |
| Mendocino | Ukiah, Fort Bragg, Willits, Point Arena |
| Humboldt | Eureka, Arcata, Ferndale, Rio Dell, Trinidad |
| Del Norte | Crescent City |
| Marin | Novato |
| Glenn, Tehama and Trinity | Portions of each county |
The Napa and Sonoma rows are the wine country half of the code. The coastal half runs from Point Arena and Fort Bragg in Mendocino County to Eureka, Arcata and Trinidad in Humboldt County, and on to Crescent City.
A caller's number reflects where the line was set up. Mobile numbers stay the same after a move, so someone calling from a 707 number could now live in another state.
707 Area Code Time Zone (Pacific Time)
Every 707 and 369 number is on Pacific Time, since federal time zone rules place California in the Pacific zone. The state also follows daylight saving time, switching from Pacific Standard Time (UTC−8) to Pacific Daylight Time (UTC−7) on the second Sunday of March and returning to standard time on the first Sunday of November.
Because the other US zones that change their clocks do so on the same dates, the gaps stay steady. When it is 9 a.m. in Santa Rosa, it is:
- 10 a.m. in the Mountain time zone (in places that observe daylight saving time)
- 11 a.m. in the Central time zone
- Noon in the Eastern time zone
If your team calls North Bay or North Coast customers from the East Coast, a 707 contact who starts work at 9 a.m. won't be at a desk until noon your time.
707 and 369: One Area, Two Area Codes
For more than 60 years, 707 served its region alone. It nearly changed in 1999, when the CPUC approved a three-way split that would have created two new codes, 369 and 627. That split never took effect, and 707 stayed a single code.
Demand caught up two decades later. The North American Numbering Plan Administrator (NANPA) first projected that 707 would run out of prefixes in the fourth quarter of 2023, then moved the forecast up to the first quarter of 2023 and declared a jeopardy situation on January 4, 2022.
Ten-digit dialing was already in place. Some 707 numbers used 988 as their prefix, so when the FCC set up 988 as the three-digit code for the suicide prevention hotline, the region switched to 1+10-digit dialing on October 24, 2021. With that settled, the CPUC concluded that an overlay was the only real option and adopted one on June 23, 2022, in Decision 22-06-031.
The overlay took effect on February 1, 2023, reusing the 369 digits from the abandoned 1999 plan. Nobody had to change a number. New lines in the region may receive a 369 number, and both codes are dialed the same way.
707 Area Code vs ZIP Codes
Searches for a "707 area code zip code" mix up two systems that were built for different purposes. The quick comparison below shows why one can't be converted into the other.
| Question | Area code 707 | ZIP Code |
|---|---|---|
| Who assigns it | NANPA, with the CPUC deciding how California codes are relieved | The US Postal Service |
| What it identifies | The region where a phone number was issued | A mail delivery area |
| How many cover the region | Two: 707 and 369 | Many, spread across 11 counties |
| Does it follow a move | A mobile number keeps its area code | A new address usually means a new ZIP Code |
To find the ZIP Code for a winery in Healdsburg or an office in Eureka, start from the street address and use the USPS ZIP Code lookup.
How to Tell If a Call From 707 Is Legitimate
A 707 number on your screen could be a neighbor, a clinic in Santa Rosa or a scammer on another continent. Caller ID is easy to fake, the FTC warns, so ask yourself three questions before you give anything away.
- 1Were you expecting this call? An out-of-the-blue call about a prize, a debt, a legal problem or a package deserves extra suspicion.
- 2Is the caller rushing you? Threats and short deadlines are pressure tactics. A genuine business or agency will let you hang up and call back.
- 3What are they asking for? The FTC treats a demand for gift cards, wire transfers, payment apps or cryptocurrency as the mark of a scammer. Don't read out one-time codes or share passwords either.
If an answer worries you, end the call and contact the organization using a number from its website or a bill. Don't press keys in a recorded message; the FTC notes that doing so can lead to more calls.
File a report at ReportFraud.ftc.gov. Registering at DoNotCall.gov reduces sales calls from companies that obey the law, but scammers ignore it, so turn on your carrier's call-blocking or labeling options or use a blocking app.
How to Dial a 707 Phone Number
Local calls in the 707 region have required the full number, 1 plus the area code plus seven digits, since October 24, 2021. The 369 overlay kept that rule, so a call between two homes in Napa is dialed the same way as a call from another state.
| Calling from | Dial | Example |
|---|---|---|
| Inside the 707 and 369 region | 1 + area code + seven digits | 1 (707) 555-0142 |
| Rest of the US and Canada | 1 + area code + seven digits | 1 (707) 555-0142 |
| Outside North America | Exit code + 1 + area code + seven digits | +1 707 555 0142 |
Three-digit service numbers work as before where they are offered, including 911, 988, 211, 311, 411, 511, 611, 711 and 811.
How to Get a 707 Phone Number for Your Business
For a winery, a North Coast contractor or a Solano County practice, a 707 number tells callers the business is local. The number doesn't need a desk phone in the region: a cloud phone account can ring it wherever your team works.
- 1Search for an available 707 number. Since 2023, some new numbers in the region carry 369, which reaches the same callers.
- 2Choose where calls go: the mobile and desktop apps, or an auto attendant that sorts callers by department.
- 3Turn on business texting so customers can message the same number they call.
- 4Port your existing number if you already have a 707 line that customers recognize.
Ringflow offers local numbers in California area codes and across the US area code list, along with toll-free numbers and a free trial. Numbers in any one code change over time, so check what's available in 707 when you sign up.
Conclusion
From Vallejo and Napa to Eureka and Crescent City, the 707 area code covers northwestern California on Pacific Time. Its history has few turning points: a split from 415 in 1959, 1+10-digit dialing in 2021, and the 369 overlay on February 1, 2023.
Before acting on a 707 call you didn't expect, check what the caller wants. Businesses aiming at North Bay or North Coast customers can pick a local number through Ringflow, answer it on any device and bring along a number they already use by porting it.
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FAQ
The 707 area code is in northwestern California. It covers all or part of 11 counties, including Sonoma, Napa, Solano, Lake, Mendocino, Humboldt and Del Norte, with cities such as Santa Rosa, Napa, Vallejo, Fairfield, Ukiah and Eureka.
The 707 area code is on Pacific Time: UTC−8 in winter and UTC−7 during daylight saving time. It is three hours behind the Eastern time zone all year.
Yes. Since February 1, 2023, the 369 area code has overlaid 707, following approval by the California Public Utilities Commission in June 2022. The two codes cover identical territory, and nobody with a 707 number had to change it.
A 707 number isn't spam by default. Caller ID can be faked, so focus on how the caller behaves: pressure, threats and requests for gift cards, wire transfers or one-time codes are warning signs. The FTC accepts fraud reports online.
Sign up with a cloud phone provider that sells California local numbers, then choose a 707 number, or a 369 number for the same region, and decide which devices ring. With Ringflow you also get mobile and desktop apps, texting from the business number, porting and a free trial.
