925
Covers California
In service since 1998
Split from area code 510
City facts
Concord area code
Area code for California: history, overlays and how to dial.
925
Concord uses area code 925.
About area code 925
How to call a number in Concord
Inside the US
1 (925) 555-0123Dial 1, the area code, then the seven-digit number.Local call
555-0123Many areas now require the area code for local calls too; if a seven-digit call fails, add it.From outside the US
+1 925 555 0123Use your country's exit code or +, then 1 for the US.Concord is on Pacific Time (PT); check the time before calling from another zone.
Other cities that share 925
Nearby area codes
| Area code | Used in | Distance |
|---|---|---|
| 707 | Vallejo | 15 mi |
| 369 | Vallejo | 15 mi |
| 510 | Richmond | 17 mi |
| 341 | Richmond | 17 mi |
| 650 | San Mateo | 33 mi |
| 209 | Stockton | 40 mi |
| 350 | Stockton | 40 mi |
| 408 | Sunnyvale | 42 mi |
Concord quick facts
Concord was incorporated on February 8, 1905.
Incorporated1905February 8, 1905
CountyContra Costa CountyCalifornia
Area code925Population124,260Census ACS estimateZIP codes594518, 94519, 94520…Elevation75 ft23 m
Time zonePacific TimePT
Dates, namesake and elevation from Wikipedia: Concord, California and Wikidata (checked 2026-11-08); population and ZIP codes from the U.S. Census Bureau.
Questions
What area code is Concord?
Concord uses area code 925.
When did area code 925 start?
Area code 925 dates from 1998, when it was split from area code 510.
What time zone is area code 925 in?
Concord is on Pacific Time (PT).
What other cities use area code 925?
Other cities in this network that share 925 include Walnut Creek, Antioch, San Ramon, Pleasanton, Livermore.
Sources: Area code 925 (Wikipedia) and Wikidata, checked 2026-11-08. Numbering plans change; the North American Numbering Plan Administrator is the official record.