Redwood City California Area Code
One area code covers Redwood City: 650.
The code covering Redwood City
| Area code | Primarily serves | In service |
|---|---|---|
| 650 | San Jose | 1997 |
Scope the codes matched to Redwood City. 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
Redwood City has a single code, so there is nothing to divide — every local line carries 650.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Redwood City’s 5 ZIP codes 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.
Redwood City California ZIP codes →
Nearby places with different codes
These are the closest places to Redwood City 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 |
|---|---|---|
| San Carlos California area codes | 3.2 mi | 415, 628, 650 |
| Menlo Park California area codes | 4.4 mi | 341, 510, 650 |
| San Mateo California area codes | 6.2 mi | 415, 628, 650 |
| Burlingame California area codes | 9.7 mi | 415, 628, 650 |
| Hayward California area codes | 9.8 mi | 341, 510 |
| Newark California area codes | 10 mi | 341, 510 |
| Union City California area codes | 12 mi | 341, 510 |
| South San Francisco California area codes | 13 mi | 415, 628, 650 |
Straight-line distance between place reference points, not driving distance.