The 627 area code serves a large portion of Northern California, including the North Coast, the northern San Francisco Bay Area, and the world-renowned Wine Country. It covers major cities like Santa Rosa, Napa, and Vallejo. This area code operates as an overlay for the original 707 area code, meaning both codes serve the same geographic area.
If you’ve seen a phone number with a 627 prefix, this guide will explain its location, the diverse communities it covers, and the important requirement for 10-digit dialing in this region of California.
Where is the 627 Area Code Located?
The 627 area code is located in Northern California. The territory it covers is extensive, stretching from the northern San Francisco Bay Area all the way to the Oregon border along the Pacific coast.
- State: California
- Major Cities: Santa Rosa, Vallejo, Napa, Eureka
- Time Zone: Pacific Time Zone (observing Pacific Standard Time, PST, and Pacific Daylight Time, PDT).
The 627 area code shares its exact geographical boundaries with the 707 area code, providing new numbers for this growing region.
What Cities and Counties Use the 627 Area Code?
The 627 area code, along with 707, covers a mix of urban centers, agricultural valleys, and rugged coastline. A phone number with this area code is located in or around one of these communities:
Major Cities in Area Code 627:
- Santa Rosa
- Vallejo
- Fairfield
- Napa
- Eureka
- Vacaville
- Petaluma
- Ukiah
- Crescent City
Primary Counties Served:
The area code covers all or parts of Sonoma, Solano, Napa, Humboldt, Mendocino, Lake, and Del Norte counties.
History of the 627 Area Code and the Overlay Plan
The 707 area code has served Northern California for decades. Due to the region’s continued growth and the increasing demand for new phone numbers for cell phones and other devices, the supply of available 707 numbers began to run out.
To address this without a disruptive geographic split, the California Public Utilities Commission (CPUC) approved an overlay plan. The new 627 area code was officially put into service on February 1, 2023.
The Requirement for 10-Digit Dialing
A key result of this overlay plan is that mandatory 10-digit dialing is in effect. Because two different area codes exist in the same location, you must dial the full 10-digit phone number (area code + seven-digit number) for all local calls. This applies whether you are calling a 627 number or a 707 number.
Frequently Asked Questions
What is the difference between area code 627 and 707?
Geographically, there is no difference. Both area codes serve the exact same cities and counties in Northern California. The only distinction is when the phone number was assigned; 627 numbers were issued to new customers starting in early 2023.
If I have a 707 number, will it change to 627?
No. A major benefit of an overlay plan is that all existing phone numbers remain the same. If you have a 707 number, you will keep it.
What time zone is area code 627?
The 627 area code is in the Pacific Time Zone. It observes Pacific Standard Time (UTC-8) and Pacific Daylight Time (UTC-7) during the summer months.
Is the 627 area code a scam?
No, 627 is a legitimate and official area code for Northern California. However, scammers can “spoof” any phone number, including those in the 627 area code. You should always be cautious when answering calls from numbers you do not recognize.
Conclusion
In summary, the 627 area code is an overlay that serves the same region as the 707 area code in Northern California, covering a diverse territory from the Wine Country to the Redwood Coast. The presence of both area codes makes 10-digit dialing a necessity for all local calls. It represents a modern solution to the growing demand for phone numbers in one of California’s most scenic and populous regions.
