Clayton California Area Code
One area code covers Clayton: 925.
The code covering Clayton
| Area code | Primarily serves | In service |
|---|---|---|
| 925 | Oakland | 1998 |
Scope the codes matched to Clayton. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot) and LocalCallingGuide NPA list (2026-07 NPA list). Updated . Overlay relationships come from the numbering-plan authority; the place match is computed.
Which part of town has which code
Clayton has a single code, so there is nothing to divide — every local line carries 925.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Clayton’s 1 ZIP code do not map onto the codes above. They are listed in full, with the county each falls in, on the postal side of the site.
Clayton California ZIP codes →
Nearby places with different codes
These are the closest places to Clayton whose area codes are not the same set. If you are near one of them, a local number may carry a code that is not on the list above.
| City | Distance | Their area codes |
|---|---|---|
| Pittsburg California area codes | 5.6 mi | 341, 510, 925 |
| Walnut Creek California area codes | 6.6 mi | 341, 510, 925 |
| Alamo California area codes | 7.5 mi | 341, 510, 925 |
| Antioch California area codes | 7.8 mi | 341, 510, 925 |
| Danville California area codes | 9.1 mi | 341, 510, 925 |
| San Ramon California area codes | 12 mi | 341, 415, 510, 628, 925 |
| Benicia California area codes | 15 mi | 369, 707, 925 |
| Piedmont California area codes | 18 mi | 341, 510 |
Straight-line distance between place reference points, not driving distance.