(925) Area Code Business Phone Numbers
Get a local (925) number that puts your business right in the middle of Concord, Walnut Creek, and the rest of the East Bay. Split off from 510 back in 1998, this code is what people in Contra Costa and the Tri-Valley recognize as home.
Get a 925 NumberAbout the 925 Area Code
The 925 code was carved out of 510 in 1998 to serve the inland side of the East Bay, from the Diablo Valley down through the Tri-Valley cities. It covers a big chunk of Contra Costa County and a slice of Alameda County, which is why you hear it just as often in Walnut Creek offices as in Livermore garages.
Concord anchors the region with a population of roughly 122,839 as of 2026[1], and it sits about 29 miles east of San Francisco with two BART stations and three freeways feeding into it[2]. Big names like the Bank of America Technology Center, John Muir Health, and Chevron all have a presence here[2], but most of the day-to-day economy runs on smaller shops, clinics, and trades.
A 925 number tells customers you are actually in the neighborhood, not routing through a call center somewhere. That matters when a Walnut Creek homeowner is deciding which plumber to call back, or when a Pleasanton office manager is picking a vendor. Tonet gives you a real local number without the hardware or the multi-year contract.
Cities Served by the 925 Area Code
The 925 stretches from the Delta towns like Antioch and Brentwood, through the Diablo Valley cities of Concord and Walnut Creek, and down into the Tri-Valley with Dublin, Pleasanton, and Livermore. Fifteen cities in all share this code.
Phone Features Built for East Bay Businesses
Whether you are running a dental office in Danville or a landscaping crew out of Antioch, these are the tools that actually get used day to day.
Auto Attendant
Greet callers with a menu that routes them to the right person, so a Livermore lead does not sit on hold while your Concord office is on another line.
Call Recording
Record calls for training or to settle a "who said what" question later. Useful for sales teams and anyone dealing with service disputes.
AI Transcription
Voicemails and calls turn into searchable text. Skim the message on the BART ride instead of holding your phone to your ear.
Business SMS
Text customers from your 925 number. Appointment reminders and quick quotes go through faster than voicemail tag.
Mobile App
Take work calls on your cell without giving out your personal number. Handy when you are on a job site in Brentwood but your office line is in Walnut Creek.
Daily Billing
Plans start at $10 per user each month, billed daily. Add or drop users as your team changes, no annual contract to lock you in.
Frequently Asked Questions
Can I get a (925) number if my business is not in Concord?
Yes. As long as you serve customers in the 925 region, you can pick up a number here. Plenty of businesses run remotely and still want a local presence in the East Bay.
How long does it take to activate a 925 number?
Most numbers are live within a few minutes of signup. If you are porting an existing 925 number from another carrier, expect a few business days for the transfer to complete.
What does a 925 business line cost?
Tonet plans start at $10 per user per month, billed daily. Extra phone numbers run $2.50 per month each. No contracts, so you can scale up or down.
Can I keep my current 925 number?
Yes, you can port it in. Bring your existing number from any provider and use it with Tonet without giving it up.
Is the 925 code the same as 510?
No. The 925 was split from 510 in 1998 to cover inland Contra Costa and the Tri-Valley. The 510 stays with the inner East Bay cities like Oakland and Berkeley.
Ready to sound local in the East Bay?
Pick a (925) number and be up and running in minutes, no hardware or contract required.
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