The 707 area code serves the North Bay and North Coast of California, including Santa Rosa, Vallejo, Napa, and Fairfield. In service since 1959, 707 covers the wine country north of San Francisco Bay and the rugged coastline stretching toward the Oregon border. If a 707 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 707 at a Glance
| Detail | Information |
|---|---|
| Area Code | 707 |
| State | California (CA) |
| Major Cities | Santa Rosa, Vallejo, Napa, Fairfield |
| Time Zone | Pacific Time (PT) |
| Country Code | +1 (USA) |
| Overlay Codes | None (single area code) |
Geographic Coverage & Major Cities
Area code 707 covers the North Bay and North Coast of California, spanning Sonoma, Napa, Solano, Mendocino, Lake, Humboldt, and Del Norte counties. It reaches from the northern edge of the San Francisco Bay Area up the coast into the redwood country.
Cities and communities served by the 707 area code include:
- Santa Rosa and Petaluma — Sonoma County’s largest cities
- Napa — the heart of California’s famed wine country
- Vallejo, Fairfield, and Vacaville — Solano County communities
- Eureka and Ukiah — the North Coast and redwood region
Because it covers wine country and the scenic North Coast, a 707 number carries a distinctive Northern California identity.
A Brief History of Area Code 707
Area code 707 was created in 1959, split from 916 to serve Northern California’s coast and North Bay counties. It has remained a single area code without an overlay for its entire history — one of the more stable codes in the state — though 10-digit dialing is now standard across California.
Time Zone & Best Time to Call
Numbers in the 707 area code use Pacific Time (PT). The region observes Daylight Saving Time, shifting from PST (UTC−8) to PDT (UTC−7) between March and November each year.
How to Dial Phone Numbers in Area Code 707
Ten-digit dialing is now standard throughout California, so always include the area code.
Calling within the United States or Canada
- 10-digit dialing: Dial the full number — 707-XXX-XXXX.
- 11-digit dialing: You can also dial 1-707-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 707 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 707 XXX XXXX
- From any mobile phone worldwide: +1 707 XXX XXXX
Is Area Code 707 a Scam? Safety & Protection Tips
Area code 707 is a legitimate California area code — a call from it is not fraudulent by default. However, scammers frequently spoof the code, faking the caller ID so their number appears to come from a trusted local North Bay line. Neighbor spoofing, which mimics your own number’s first six digits, is especially common.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Government impersonation | Callers posing as the IRS or SSA threatening arrest or fines |
| Utility & wildfire-relief scams | Fake charities or “assistance” requests after local disasters |
| Bank & card fraud alerts | Claims of “suspicious activity” seeking your account details |
| Vacation & rental scams | Fake wine-country rentals requesting deposits |
How to report, block, and look up 707 callers
- Never share personal or financial details with an unexpected caller, however urgent they sound.
- Block the number using your phone’s built-in call-blocking feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before returning any call.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in California
Area code 707 borders several other Northern California codes:
- 415 & 628 — San Francisco and Marin County to the south (see our 415 area code guide)
- 510 & 341 — the East Bay (see our 510 area code guide)
- 916 & 279 — Sacramento to the east
- 925 — the inland East Bay
Explore more codes across the state on our California area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border California:
Frequently Asked Questions About Area Code 707
Where is the 707 area code located?
Area code 707 covers the North Bay and North Coast of California, including Santa Rosa, Napa, Vallejo, Fairfield, and Eureka. It operates on Pacific Time.
Is 707 a landline or cell phone area code?
Both. Area code 707 serves landlines, mobile phones, and VoIP numbers throughout the North Bay and North Coast.
Does 707 have an overlay area code?
No. 707 remains a single area code without an overlay, though 10-digit dialing is now standard statewide.
Should I answer a call from an unknown 707 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 707 Guides
- Is a 707 call safe? Read Is area code 707 a scam? Spam & safety guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.