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The 925 area code covers the highly dense, vital region of the East Bay in Northern California, specifically the affluent inland suburbs of the San Francisco Bay Area. This makes it an essential choice for businesses seeking a credible local presence in the region’s key technology, energy, healthcare, and finance centers.
Getting a 925 number helps companies build trust, improve call response rates, and connect more effectively with customers across Walnut Creek, Concord, Pleasanton, and the broader Contra Costa and Alameda County metropolitan areas. The 925 area code is a high-demand code for its region and serves as a primary identifier for the Tri-Valley Tech Corridor and the thriving suburban communities of the outer East Bay.
The 925 area code is a telephone area code in the North American Numbering Plan (NANP) serving a critical, high-density region of the East Bay in California. It primarily covers the affluent inland suburbs of the San Francisco Bay Area, encompassing a diverse mix of global technology headquarters, major medical facilities, and high-growth residential communities.
It covers the core of Contra Costa County and the eastern portion of Alameda County, including cities like Walnut Creek, Concord, and San Ramon. The 925 area code was created in 1998 as a split from the 510 area code, which itself was once part of the original 415 area code—one of the first area codes established in the United States in 1947.
The 925 area code encompasses the core region of the inland East Bay, serving as a primary and historically significant area code for the region. This area includes major centers of innovation, retail, and corporate administration.
Here is a comprehensive breakdown of the major cities and areas covered by the 925 area code:
The 925 area code serves the core of Contra Costa County and the Tri-Valley region, which is a unique and high-value numbering plan area. As one of the most affluent and highly educated regions in California, the local economy is characterized by robust growth and significant commercial activity in the technology and professional services sectors.
Based on the analysis of Contra Costa County, the 2026 population is estimated at 1,193,463, reflecting a 0.88% annual growth rate. The region's median household income is $127,229, and the average per capita income is $71,603. The region's poverty rate stands at 8.36%.
Demographically, the population is distinctly diverse, with the racial composition of the area consisting of White residents at 41.12%, Asian residents at 18.85%, and Black or African American residents at 8.28%. Additionally, individuals identifying as two or more races make up 16.36% of the population, while other race groups account for 13.93%, and Native American or Pacific Islander residents represent 1.46%.
The 925 area code, which serves the core of the inland East Bay, is located entirely within the Pacific Time Zone (PT). This means that during standard time, the time zone is Pacific Standard Time (PST), which is UTC-8. During daylight saving time, the time zone is Pacific Daylight Time (PDT), which is UTC-7.
This time zone serves all the major hubs of the region, including Walnut Creek, Pleasanton, and Concord. Maintaining Pacific Time ensures that local businesses remain synchronized with the major tech hubs of Silicon Valley and the financial markets of San Francisco, as well as the broader West Coast economy.
The 925 area code adds local trust and credibility, making it valuable for local businesses. Here’s how a business number with the 925 area code is important for your business:
When customers see a local 925 area code number, they immediately recognize it as part of their community. This familiarity creates trust and reduces hesitation to answer calls. Research shows that consumers are more likely to pick up calls from numbers with local area codes compared to unfamiliar or out-of-state numbers.
For small businesses, using a local area code 925 number shows commitment to serving the community. For larger enterprises, it signals accessibility and helps build stronger relationships with regional customers.
Some well-known enterprises that would benefit from a local 925 number include:
The 925 area code provides a local caller ID that increases customer trust, making it easier for firms to manage communications with high-net-worth individuals and corporate clients across the East Bay suburbs.
The 925 area code helps the region’s world-class hospitals and research facilities reduce missed appointments and provides local, trusted lines for patient support and specialty care.
The 925 code provides dedicated local service lines that improve coordination for regional transit, corporate logistics, and the booming retail corridors in Walnut Creek and Pleasanton.
The 925 code enables IT companies and satellite offices to offer localized sales and support lines that East Bay businesses trust, especially within the "Tri-Valley Tech Corridor."
Setting up your 925 area code number with Goodcall is quick and straightforward. Here’s how it works:
Choosing Goodcall means more than just getting a local number; it means equipping your business with tools to handle calls efficiently.
With these advantages, Goodcall makes it easier for you to manage calls and focus on growing your business.
Our local 925 area code numbers come with affordable pricing plans designed to fit every business size. We offer flexible pricing options that scale with your needs, whether you’re a startup or an established enterprise. Additionally, you can save 30% on annual subscriptions, giving your business more value at a lower cost.
What is the 925 area code, and where is it located?
The 925 area code serves the inland regions of the East Bay in Northern California, primarily covering Contra Costa County and eastern Alameda County. It represents one of the most economically significant and affluent regions in the San Francisco Bay Area. It was created as a split from the 510 area code.
What cities does the 925 area code cover?
The 925 area code covers several major cities and high-density suburban hubs, including Concord, Walnut Creek, San Ramon, Pleasanton, and Livermore.
What time zone is area code 925 in?
The 925 area code, serving the inland East Bay suburbs, is in the Pacific Time Zone (PT).
Does the 925 area code get spam calls?
Like any area code, spam and robocalls do occur, but using a trusted business provider like Goodcall helps filter unwanted calls.
Which types of businesses benefit most from a local 925 number?
Local service providers, tech companies, restaurants, real estate agents, and startups benefit from a 925 number, as it boosts local trust and visibility.
How can I get a local 925 area code number for my business?
You can get a 925 number easily by signing up with Goodcall, choosing your plan, and selecting your preferred local number.
Can I forward calls from my 925 number elsewhere?
Yes. With Goodcall, you can forward calls to any phone, ensuring you never miss a customer inquiry.
How much does it cost to get a 925 area code number?
Goodcall plans are affordable and flexible, at $66 per month per agent annually.
Is the 925 area code toll-free?
No, 925 is not a toll-free area code. It’s a geographic code for East Bay, designed to give businesses a trusted local identity. Toll-free numbers in the US typically begin with prefixes such as 800, 888, 877, or 855.