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Area Code 925 Location & Details

State / Region: California • Country: United States

Major Cities Covered: Concord, Antioch, San Ramon, Livermore, Pittsburg, Pleasanton, Dublin, Walnut Creek, Brentwood, Oakley

Standard Dial Format
+1 (925) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 925?
CaliforniaState Hub →
Country Territory
United States
925 Area Code Time Zone
Pacific
925 Overlay Codes
No Overlays

Area Code 925 Geographic Map

Interactive location bounds and coverage area for California (Pacific Timezone)

Lat: 37.85° • Lng: -121.75°
📍 Geographic Center: CaliforniaMap data © OpenStreetMap contributors

Where is Area Code 925 Located?

Telephone area code 925 is assigned to California in United States. It serves cities and metropolitan communities including Concord, Antioch, San Ramon, Livermore, Pittsburg, Pleasanton, Dublin, Walnut Creek, Brentwood, Oakley.

Historical Context & Area Code Overlay Information:925 serves California (United States).

For local and long-distance calls within area code 925, standard 10-digit dialing (925) XXX-XXXX applies.

Who Called Me from Area Code 925?

Received an unknown call, missed call, or text scam from area code 925? Here is how to trace who is calling from 925 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 925 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 925:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 925 & Dialing Format

When placing a phone call to a number in area code 925, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (925) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 925 + 7-digit number.
  • Do I need to dial area code 925 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 925

Urban centers, census places, and communities within the +1-925 calling area

18 Major Cities Listed
City NameCountyPopulation% of 925 Pop
ConcordContra Costa County123,26112.2%
AntiochContra Costa County118,95811.8%
San RamonAlameda County86,2098.5%
LivermoreAlameda County83,4578.3%
PittsburgContra Costa County77,5427.7%
PleasantonAlameda County74,5567.4%
DublinAlameda County71,6027.1%
Walnut CreekContra Costa County70,0126.9%
BrentwoodContra Costa County66,6076.6%
OakleyContra Costa County47,5834.7%
DanvilleContra Costa County43,3024.3%
MartinezContra Costa County36,8493.6%
Pleasant HillContra Costa County34,0173.4%
LafayetteContra Costa County25,3132.5%
OrindaContra Costa County19,5071.9%
MoragaContra Costa County16,3221.6%
ClaytonContra Costa County10,8421.1%
BishopMono County3,6960.4%

Counties Covered by Area Code 925

Geographic county distribution and population coverage across California

County NameTotal Population% of 925 Area% of County
Contra Costa County1,169,53468.4%59%
Alameda County1,636,62431.3%19%
Mono County12,6920.4%29%

☎️Area Code 925 Exchange Prefixes & Carriers

Showing 50 of 652 central office 3-digit prefixes and assigned telecom carriers

69% Landline23% Wireless7% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(925) 200-📱WirelessPLEASANTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CAN/A
(925) 201-📞LandlinePLEASANTONU.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONSN/A
(925) 202-📱WirelessPLEASANTONT-MOBILE USA, INC.N/A
(925) 203-📱WirelessPITTSBURGNEW CINGULAR WIRELESS PCS, LLC02/22/2002
(925) 204-📱WirelessANTIOCHT-MOBILE USA, INC.09/22/2015
(925) 205-📱WirelessDANVILLET-MOBILE USA, INC.08/16/2023
(925) 206-📱WirelessANTIOCHCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA08/29/2007
(925) 207-📱WirelessCONCORDMETROPCS, INC.10/18/2001
(925) 208-📞LandlineDANVILLETELEPORT COMMUNICATIONS AMERICA, LLC - CAN/A
(925) 209-📱WirelessPLEASANTONT-MOBILE USA, INC.N/A
(925) 210-📞LandlineWALNUT CRKPACIFIC BELLN/A
(925) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(925) 212-📱WirelessWALNUT CRKNEW CINGULAR WIRELESS PCS, LLCN/A
(925) 213-📞LandlineWALNUT CRKSPOK, INC.N/A
(925) 214-💻VoIPWALNUT CRKPEERLESS NETWORK OF CALIFORNIA, LLC - CA09/10/2016
(925) 215-📞LandlineLIVERMORELEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 216-📱WirelessDUBLN-SNRMNEW CINGULAR WIRELESS PCS, LLCN/A
(925) 217-📞LandlineDANVILLELEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 218-📞LandlinePLEASANTONLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 219-📞LandlineANTIOCHLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 220-📱WirelessPITTSBURGCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA10/02/2023
(925) 221-📱WirelessWALNUT CRK33 WIRELESS INC.N/A
(925) 222-💻VoIPCONCORDONVOY, LLC - CAN/A
(925) 223-📞LandlinePLEASANTONMCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(925) 224-📞LandlinePLEASANTONPACIFIC BELLN/A
(925) 225-📞LandlinePLEASANTONPACIFIC BELLN/A
(925) 226-📞LandlinePLEASANTONMCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(925) 227-📞LandlinePLEASANTONPACIFIC BELLN/A
(925) 228-📞LandlineMARTINEZPACIFIC BELLN/A
(925) 229-📞LandlineMARTINEZPACIFIC BELLN/A
(925) 230-📞LandlineDUBLN-SNRMLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 231-📞LandlineMARTINEZLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 232-📞LandlinePSBG WESTLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 233-📞LandlineSUNOLLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 234-📞LandlineANTIOCHLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 235-📞LandlineMORAGALEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 236-📞LandlineDUBLN-SNRMLEVEL 3 COMMUNICATIONS, LLC - CAN/A
(925) 237-📞LandlineANTIOCHMCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(925) 238-📞LandlineANTIOCHCOMCAST PHONE OF CALIFORNIA, LLC10/31/2008
(925) 239-💻VoIPWALNUT CRKPEERLESS NETWORK OF CALIFORNIA, LLC - CA03/25/2013
(925) 240-📞LandlineECONTRCOSTPACIFIC BELLN/A
(925) 241-📞LandlineDUBLN-SNRMMCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(925) 242-📞LandlineBSHP RNCHPACIFIC BELLN/A
(925) 243-📞LandlineLIVERMOREPACIFIC BELLN/A
(925) 244-📞LandlineBSHP RNCHPACIFIC BELLN/A
(925) 245-📞LandlineLIVERMOREPACIFIC BELLN/A
(925) 246-📞LandlineCONCORDPACIFIC BELLN/A
(925) 247-📞LandlineMORAGAPACIFIC BELLN/A
(925) 248-📞LandlineDUBLN-SNRMPACIFIC BELLN/A
(925) 249-📞LandlinePLEASANTONPACIFIC BELLN/A

Frequently Asked Questions about Area Code 925

Where is area code 925 located?

Area code 925 is located in California (United States), serving cities like Concord, Antioch, San Ramon, Livermore, Pittsburg, Pleasanton, Dublin, Walnut Creek, Brentwood, Oakley.

What timezone is area code 925?

Area code 925 operates in the Pacific timezone.

What state is area code 925?

Area code 925 is assigned to the state / telecom territory of California.

Is area code 925 a scam or dangerous?

Area code 925 is an official geographic area code for California. However, beware of robocaller spoofing.

California State Area Codes

View complete directory of telephone area codes assigned to California.

Explore California Directory

Get a 925 Business Phone Number

How to acquire a virtual phone number or business line with area code 925 for local customer trust in California.

Get 925 Business Number
🛡️ Scam & Safety Directory

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Overlay & Nearby Area Codes for California

Explore neighboring telecom prefixes sharing geographical boundaries with area code 925.

209
Pacific
Area Code 209
Stockton, Modesto, Tracy, Merced, Manteca, Turlock, Lodi, Los Banos, Ceres, Lathrop
213
Pacific
Area Code 213
Los Angeles, Montebello, Commerce, Vernon
279
Pacific
Area Code 279
Sacramento, Elk Grove, Roseville, Folsom, Rancho Cordova, Citrus Heights, Rocklin, Lincoln, West Sacramento, Loomis
310
Pacific
Area Code 310
Torrance, Inglewood, Carson, Compton, Santa Monica, South Gate, Hawthorne, Redondo Beach, Lynwood, Gardena
323
Pacific
Area Code 323
Los Angeles, South Gate, Montebello, Huntington Park, Bell Gardens, Commerce, Vernon
341
Pacific
Area Code 341
Oakland, Fremont, Hayward, Berkeley, Richmond, San Leandro, Milpitas, Alameda, Union City, Newark