ZIP Code 94403
94403 is one of California's ZIP codes, delivering to addresses in San Mateo, San Mateo County.
- City
- San Mateo
- County
- San Mateo County
- State
- California
- Prefix
- 944xx
Where this code sits
94403 is part of the 944xx range, the group of codes handled by one mail processing centre. San Mateo is served by 5 ZIP codes in total; the full list, with the county each falls in, is on the San Mateo page.
San Mateo California ZIP codes →
Area codes over the same ground
Postal and telephone geography are drawn separately, so these codes cover the area 94403 delivers to without sharing its boundary.
ZIP codes nearest 94403
| ZIP code | Distance | Delivers to |
|---|---|---|
| ZIP code 94497 | 1.5 mi | San Mateo, CA |
| ZIP code 94002 | 1.6 mi | Belmont, CA |
| ZIP code 94402 | 1.7 mi | San Mateo, CA |
| ZIP code 94404 | 1.9 mi | San Mateo, CA |
| ZIP code 94401 | 2.7 mi | San Mateo, CA |
| ZIP code 94065 | 2.8 mi | Redwood City, CA |
| ZIP code 94070 | 3.4 mi | San Carlos, CA |
| ZIP code 94010 | 4.2 mi | Burlingame, CA |
Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope ZIP code 94403. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.