Area Code Box

Area code 925

Where is area code 925?

Walnut Creek, Concord and Pleasanton, California

Local time: … (Pacific Time)

StateCalifornia
CountryUnited States
Main citiesWalnut Creek, Concord and Pleasanton
Time zonePacific Time
Overlay area codesNone
In service since1998 (created from 510)
Assigned prefixes640
Dialing format(925) XXX-XXXX · +1 925 XXX XXXX from abroad

Look up a 925 number

Enter a 3-digit area code or a full 10-digit number.

Cities and towns in area code 925

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 925.

Phone companies in area code 925

The carriers that hold the most 925 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

PrefixesCarrier
206Pacific Bell (AT&T)
48New Cingular Wireless PCS (AT&T)
48Mcimetro Access Transmission Services
44T-Mobile USA
38Verizon Wireless
37Tpx Communications
33Level 3 Communications
32Onvoy

All 640 prefixes in area code 925

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Questions

Where is area code 925?
Area code 925 is in California. It serves Walnut Creek, Concord, Pleasanton, Antioch and Livermore and 14 other cities and towns.
What time zone is area code 925 in?
Area code 925 uses Pacific Time.
Is a call from area code 925 a scam?
The area code alone doesn’t tell you. Most calls from 925 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 925 number, let it go to voicemail.
When did area code 925 start?
925 went into service in 1998. It was created from area code 510.
Can a 925 number be outside California?
Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 925 caller can be anywhere.

Other area codes in California

Area codeMain cities
209Stockton, Modesto and Merced
213Lsan Da 01, Los Angeles and Lsan Da 10
279Sacramento, Folsom and Elk Grove
310Los Angeles, Gardena and Beverly Hills
323Los Angeles, Montebello and South Gate
341Fremont, Oakland and Hayward
350Stockton, Modesto and Atwater
357Clovis, Firebaugh and Fresno
369Santa Rosa, Clearlake and Fairfield
408San Jose, Sunnyvale and Campbell
415San Francisco, San Rafael and Novato
424Los Angeles, Torrance and Beverly Hills
442Victorville, Palm Springs and Indio
510Oakland, Fremont and Hayward
530Chico, Redding and Yuba City
559Fresno, Visalia and Clovis
562Long Beach, Bellflower and Downey
619San Diego, Chula Vista and El Cajon
626Alhambra, Pasadena and Covina
628San Francisco, San Rafael and Novato
650Palo Alto, San Mateo and Mountain View
657Anaheim, Huntington Beach and Santa Ana
661Bakersfield, Palmdale and Valencia
669San Jose, Campbell and Sunnyvale
707Santa Rosa, Fairfield and Vallejo
714Anaheim, Santa Ana and Orange
738Los Angeles, South Gate and Lsan Da 01
747Burbank, Calabasas and Glendale
760Palm Springs, Vista and Escondido
805Oxnard, Santa Barbara and Thousand Oaks
818Van Nuys, Calabasas and Burbank
820Camarillo, Oxnard and Newbury Park
831Salinas, Santa Cruz and Monterey
837Redding, Auburn and Chico
840San Bernardino, Pomona and Lake Arrowhead
858San Diego, Poway and Chula Vista
909Ontario, San Bernardino and Rancho Cucamonga
916Sacramento, Roseville and Folsom
949Irvine, Aliso Viejo and Newport Beach
951Riverside, Corona and Temecula