If a call from the 707 area code just showed up on your phone, you're hearing from one of California's most geographically diverse regions. The 707 area code stretches from the vineyards of Napa and Sonoma counties up through the rugged North Coast redwood country, and it's been the dialing prefix for this part of the state since long before most of its wineries became household names.
This guide covers everything worth knowing about the 707 area code: where it's located, which cities and counties it covers, what time zone it runs on, the scam patterns to watch for, and how to get a local 707 number if you're opening a business or expanding into Northern California.
The 707 area code covers a large stretch of Northern California, running from the North Bay up through the state's rural North Coast. It's one of the largest area codes in California by land area, even though its population is concentrated in a handful of urban centers.
Major cities and regions served by the 707 area code include:
Geographically, the 707 numbering plan area covers all or part of Del Norte, Glenn, Humboldt, Lake, Marin, Mendocino, Napa, Solano, Sonoma, Tehama, and Trinity counties. It's a mix of wine country suburbs, coastal timber towns, and rural farming communities stretching almost to the Oregon border.
That kind of longevity is unusual — most area codes created in the same era have since been split multiple times as population and phone demand grew. The 707 numbering plan area held on to its original boundaries for over six decades before regulators needed to intervene again.
Because 707 and 369 now share the same footprint, all calls within the region — even local ones — require 10-digit dialing (area code plus the seven-digit number). If your business phone system still assumes 7-digit local dialing, this is worth double-checking.
The entire 707 area code sits in the Pacific Time Zone, observing:
That means if you're calling a 707 number from the East Coast, you're generally three hours ahead — worth keeping in mind before you dial early in the morning or late in the evening.
707 numbers belong to residents and businesses throughout California's North Bay wine country and the more rural North Coast — a region built around tourism, agriculture, and a growing logistics and commuter presence tied to the greater Bay Area. As Solano County suburbs like Vacaville and Fairfield draw more Bay Area workers, more companies request local 707 numbers to build trust with customers who still associate the area code with the region.
It's also common for out-of-area businesses — wineries' e-commerce operations, tourism companies, and regional retailers — to acquire a 707 number specifically to establish a local presence without opening a physical office in Sonoma or Napa.
Area code 707 itself is completely legitimate — it's simply the dialing code for a large, real part of Northern California. But like most active area codes, it's frequently spoofed by scammers who fake a local caller ID so residents are more likely to answer a call that looks like it's coming from their own neighborhood.
Common scams reported against 707 numbers include:
If you receive a suspicious call from a 707 number, don't share personal or financial information, hang up on any recorded message demanding immediate payment, and report the call to the Federal Trade Commission. The area code isn't the problem — caller ID spoofing simply makes it easy for bad actors to borrow it.
If you want a 707 number for personal or business use, the fastest option today is a cloud business phone platform. With a provider like Softtop, getting a 707 number takes just a few steps:
Because Softtop provisions numbers instantly and supports number porting with zero port-out fees, you can also move an existing 707 number onto the platform in five to ten business days if you're switching providers rather than starting fresh.