Area code
Area code 925 — Walnut Creek, CA
California · in service since March 14, 1998
Area code 925 covers parts of California; the place with the most of its prefixes is Walnut Creek. It was created from area code 510 on March 14, 1998 and no other code overlays it.
Local time in Walnut Creek
Spam reports from Sep 23 – Oct 22, 2026
High #78 of 461 codes
767 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zonePacific Time
- Local calls1 + 10 digits
- Prefixes655 assigned
- Runs out~3Q 2051
- Unwanted call?Block & report
Spam call reports about 925 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 44 |
| Sep 14 | 162 |
| Sep 21 | 165 |
| Sep 28 | 138 |
| Oct 5 | 184 |
| Oct 12 | 194 |
| Oct 19 (4 days) | 151 |
Compared with all codes
- Robocalls
- 66%all codes 75%
- Callers with the same code
- 52%all codes 35%
- Rank by complaints
- #78of 461 · top quarter
- FCC complaints, Oct 2025 – Sep 2026
- 9115 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 174 17% | |
| Dropped call or no message | 112 11% | |
| Calls pretending to be government, businesses, or family and friends | 78 8% | |
| Medical & prescriptions | 53 5% | |
| Warranties & protection plans | 29 3% | |
| Energy, solar, & utilities | 20 2% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| California | 714 69% | |
| Florida | 33 3% | |
| New Jersey | 30 3% | |
| Texas | 25 2% | |
| New York | 22 2% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 925 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| WALNUT CRK | Walnut Creek | Contra Costa County | 103 |
| CONCORD | Concord | Contra Costa County | 89 |
| PLEASANTON | Pleasanton | Alameda County | 76 |
| ANTIOCH | Antioch | Contra Costa County | 67 |
| LIVERMORE | Livermore | Alameda County | 50 |
| BSHP RNCH | — | — | 43 |
| DUBLN-SNRM | — | — | 42 |
| DANVILLE | Danville | Contra Costa County | 38 |
| ECONTRCOST | — | — | 22 |
| MARTINEZ | Martinez | Contra Costa County | 22 |
Plus 7 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- California
- Assigned by NANPA
- May 19, 1997
- Created from
- 510
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-556, PL-544, PL-080, PL-061
Source: NANPA, NPA database of Oct 24, 2026.
Is 925 running out of numbers?
Previous forecast (October 2025): 2050, moved later by 1 year.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 925 prefixes
The five largest of 33 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Pacific Bell | 206 31% | |
| Mcimetro Access Transmission Services LLC | 48 7% | |
| New Cingular Wireless PCS, LLC | 48 7% | |
| T-Mobile USA, Inc. | 44 7% | |
| Verizon Wireless | 38 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 925
What area code is 925?
A California area code, in service since March 14, 1998.
Where is 925 area code, and what time zone is it in?
Walnut Creek, CA; Pacific Time.
Why am I getting spam calls from 925?
767 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 925 get a new area code?
NANPA forecasts exhaust in 3Q 2051; no relief planning listed.