Every US area code, explainedUnited States · +1
Area Code Contact ES
Menu
AREA CODE · CALIFORNIA

Area code 925

Area code 925 covers Walnut Creek, California. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: California Major City: Walnut Creek Pacific Time (PT) Overlay: None
01 / WHERE IT IS

Where is area code 925?

Area code 925 is assigned to Walnut Creek and the surrounding region in California. Calls to numbers that start with 925 are routed to this area.

Area code 925 is not currently part of an overlay: it serves its territory on its own.

Counties covered

Contra Costa CountyAlameda County

Line types

  • Mobile 23.1%
  • Landline 76.9%
02 / MAP

Area code 925 on the map

The shaded area joins the code’s numbering centers; the marker shows its main city.

Loading…

© OpenStreetMap contributors

03 / LOCAL TIME

Current time in Walnut Creek

This area code is in the Pacific Time (PT) time zone.

Local timeWalnut Creek, CA--:--:--

Loading…

America/Los_AngelesLive
04 / HOW TO DIAL

How to call Walnut Creek

WITHIN THE US925 XXX XXXX

Always 10 digits — landline, mobile or VoIP. Local, long distance or a different state: the format is always the same. You do not need to dial the 1 first.

FROM ABROAD+1 925 XXX XXXX

Exit codes: 00 Europe/Mexico · 011 Canada · 010 Japan · + universal

WHATSAPP / IMESSAGE+1 925 XXX XXXX

Always save the number in international format so messaging apps recognize it correctly:

Call typeTraditional landlineMobile / VoIP
Local (same area code)10 digits10 digits
US long distance1 + 10 digits10 digits
Emergency911911
🌐Universal+1 925 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 925 555 0123
🇦🇺Australia0011 1 925 555 0123
🇯🇵Japan010 1 925 555 0123
HAVE THE FULL NUMBER?

Learn more about that number.

Check the line type and the carrier the number block was originally assigned to.

10 digits to see the carrier and line type of the number

05 / CARRIERS

Carriers in area code 925

Share of the number blocks by carrier and line type.

Landline

AT&T
48%
Verizon Business
10%
Lumen Technologies
9%
TPx Communications
8%
Sinch
5%
Others
20%

Mobile

AT&T Mobility
33%
T-MOBILE USA
29%
Verizon Wireless
26%
USA Mobility
7%
Sinch
2%
Others
3%

Carrier shown is the original assignment of each number block and may differ today because of number portability.

06 / PREFIXES

Complete list of prefixes for area code 925

632 number blocks (NXX) assigned in this area code.

PrefixTypeCityCarrier
(925) 200 Mobile Pleasanton Verizon WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
(925) 201 Landline Pleasanton TPx CommunicationsU.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
(925) 202 Mobile Pleasanton T-MOBILE USAT-MOBILE USA, INC.
(925) 203 Mobile Pittsburg AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC
(925) 204 Mobile Antioch T-MOBILE USAT-MOBILE USA, INC.
(925) 205 Mobile Danville T-MOBILE USAT-MOBILE USA, INC.
(925) 206 Mobile Antioch Verizon WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
(925) 207 Landline Concord Metro by T-MobileMETROPCS, INC.
(925) 208 Landline Danville AT&TTELEPORT COMMUNICATIONS AMERICA, LLC - CA
(925) 209 Mobile Pleasanton T-MOBILE USAT-MOBILE USA, INC.

Showing 10 of 632 prefixes

07 / FAQ

Frequently asked questions about area code 925

Where is area code 925 used?
Area code 925 serves Walnut Creek and the surrounding area in California, including Contra Costa County, Alameda County.
What city is area code 925 from?
The main city of area code 925 is Walnut Creek, CA.
What time zone is area code 925 in?
Area code 925 is in the Pacific Time (PT) time zone (America/Los_Angeles).
Is 925 an overlay area code?
No. Area code 925 is not currently part of an overlay.
How do I call a number with area code 925 from the United States?
Dial the 10 digits: 925 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 925 number from another country?
Dial your country's exit code (or +), then 1, then 925 and the seven-digit number. From a mobile you can use +1 925 XXX XXXX.
Which carriers use area code 925?
Most landline blocks belong to AT&T and most mobile blocks to AT&T Mobility. The carrier shown is the original assignment and may differ today because of number portability.
Is area code 925 for landlines, mobiles or both?
Both. About 76.9% of the number blocks are landline, 23.1% mobile.
How do I save a 925 number in WhatsApp or my phone?
Save it in international format: +1 925 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 925?
The area code only shows the region a number was assigned to; it does not tell you who is calling. Scammers can fake any area code, so do not share personal or banking information with unknown callers, and let unknown numbers go to voicemail.
KEEP EXPLORING

Nearby area codes

775Reno, NV702Las Vegas, NV725Las Vegas, NV541Eugene, OR458Eugene, OR503Portland, OR

Other area codes in California

209 · Modesto213 · Los Angeles310 · Compton: Gardena DA323 · Los Angeles341 · Fremont-Newark: Main DA350 · Modesto369 · Santa Rosa408 · San Jose: West DA415 · San Francisco: Central DA424 · Beverly Hills442 · Victorville: Victorville DA510 · Oakland: Main-Piedmont DA530 · Chico559 · Fresno562 · Long Beach619 · San Diego: San Diego DA626 · Alhambra628 · San Francisco: Central DA650 · Palo Alto657 · Anaheim661 · Bakersfield: Main DA669 · San Jose: West DA707 · Santa Rosa714 · Anaheim747 · Burbank: Burbank DA760 · Palm Springs805 · Santa Barbara818 · Van Nuys820 · Camarillo831 · Salinas840 · Pomona858 · La Jolla909 · Ontario916 · Sacramento: Main DA949 · Irvine951 · Riverside

View all California area codes →