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Where is the 925 Area Code?
The 925 area code is located in the East Bay region of California, United States, and was created in 1998 as a split from the 510 area code. It includes major cities such as Concord, Walnut Creek, and San Ramon, covering urban centers, suburban communities, and smaller towns to support local communication across California’s East Bay.
Key Locations within the 925 Area Code:
- Major Cities & Communities: Concord, Antioch, Livermore, San Ramon, Pleasanton, Walnut Creek, Pittsburg, Brentwood, Dublin, Danville, Martinez, Oakley, Pleasant Hill, Lafayette, Bay Point
- Counties (Partial or Complete Coverage): Contra Costa, Alameda
Time Zone
The 925 area code, covering California’s East Bay including Concord, Walnut Creek, and San Ramon, is in the Pacific Time Zone (PT). The region observes Pacific Standard Time (PST, UTC−8) during the winter months and switches to Pacific Daylight Time (PDT, UTC−7) for daylight saving time in the summer.
About the 925 Area Code in California
The 925 area code was introduced in March 1998 to serve Contra Costa and eastern Alameda County in California’s East Bay. It includes key economic hubs such as Concord, Walnut Creek, and Livermore. The area plays a key role in the East Bay economy, which has a combined gross regional product approaching roughly $290–$300 billion in recent estimates for the broader East Bay region. In addition, Contra Costa County generated approximately $96.6 billion in GDP in 2024, according to U.S. Bureau of Economic Analysis data.
Key Economic Sectors in the 925 Region:
- Technology & Innovation: Workday, Snowflake, SAP.
- Healthcare & Medical Services: Kaiser Permanente, John Muir Health, San Ramon Regional Medical Center.
- Professional & Business Services: Robert Half, Five9, Ellie Mae (ICE Mortgage Technology).
- Research & Advanced Manufacturing: Lawrence Livermore National Laboratory, Sandia National Laboratories, Lam Research. These industries operate across the inland East Bay under the 925 area code. They support a robust local economy and help define a sophisticated, innovation-driven identity for the region's business community.
History of Area Code 925
The Area Code 925 was introduced on March 14, 1998, when it was split from Area Code 510 to accommodate the growing demand for telephone numbers in California’s inland East Bay. It was created to serve Contra Costa County and the Tri-Valley portion of Alameda County, including cities such as Concord, Walnut Creek, Pleasanton, Livermore, and San Ramon.
Unlike many other California area codes, 925 has not required an overlay and has remained geographically distinct since its creation. In 2021, ten-digit dialing became mandatory in the region as part of the nationwide transition to support the 988 crisis hotline.
Search Virtual Phone Numbers with 925 Area Code
Pick your desired virtual phone numbers with a 925 area code from our broad collection. Gain immediate access to the Concord market.
No Numbers Found
Some numbers require ID and address verification under local laws. Certain numbers also require A2P 10DLC registration to send SMS or MMS to the United States. Moreover, some numbers may not appear in this search because they are not generally offered to customers and are available only on request. Please Contact Support for assistance.
How Does a 925 Phone Number Work for Your Business?
A 925 phone number helps your business establish a local presence in California’s East Bay, covering areas such as Concord, Walnut Creek, and Pleasanton. It allows companies to connect with customers across Contra Costa and Alameda counties using landlines, mobile phones, or VoIP systems without requiring a dedicated physical office.
In the 925 region, local calls within the same area code must be dialed using the full 10‑digit number (area code + phone number), and long‑distance calls within the U.S. are made by adding a leading 1 before the 10‑digit number (for example, 1‑925‑555‑XXXX). International callers can reach local numbers by dialing their country’s exit code, followed by the U.S. country code 1 and the 925 number.
Major carriers serving the 925 region include AT&T, Verizon, and T‑Mobile, alongside competitive local providers. Businesses can also obtain virtual 925 numbers through VoIP services such as Calilio and take advantage of features like call forwarding, auto-attendant, and IVR to maintain a reliable local presence.
925 Nearby Area Codes
Key Features of a 925 Area Code Virtual Phone Number
How to Get a 925 Area Code Phone Number?
Sign up with Calilio and follow the given setup steps below to activate your 925 area code phone number.
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Create an account on Calilio & log in to your dashboard.
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Navigate to the left sidebar and click the plus symbol (+) located next to the Number section.
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You will land on the My Number page; select the United States as the country for a 925 area code number.
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Select the Number Type and then choose the Capabilities (SMS, Voice, MMS).
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Scroll down, select an available number from the list, and click the "Add to Cart" button.
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In the final step, enter your name and click Confirm Purchase from the cart to complete payment and activate your virtual number.
Already Have a Local Phone Number with 925 Area Code?
Port your 925 area code number to Calilio to access features like IVR, call forwarding, and virtual business tools without losing your established local identity.
925 Phone Number With Calilio
Acquiring the 925 phone number on Calilio means choosing excellence and reliability in communication services. Experience top-notch quality and service in your Concord area number with us.
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