92143 ZIP Code: San Ysidro, California
ZIP code 92143 covers San Ysidro, California. It sits in San Diego County. San Ysidro is covered by 2 ZIP codes in total, so 92143 is one delivery area within it rather than the whole city. A ZIP code is a US Postal Service mail route, not a boundary on a map, so it describes where post is delivered rather than an administrative area.
| ZIP code | 92143 |
|---|---|
| Place | San Ysidro |
| State | California (CA) |
| County or equivalent | San Diego County |
| ZIP codes covering San Ysidro | 2 |
| Phone area codes in California | 37 |
| Country | United States |
Phone area codes in California
ZIP codes and area codes are separate systems drawn for different purposes, so no ZIP code maps to exactly one area code. These are every geographic code used across California.
Other ZIP codes in San Ysidro
ZIP codes near 92143
- 92066 Ranchitaabout 4 miles
- 92086 Warner Springsabout 6 miles
- 92070 Santa Ysabelabout 11 miles
- 92004 Borrego Springsabout 12 miles
- 92036 Julianabout 14 miles
- 92060 Palomar Mountainabout 19 miles
- 92536 Aguangaabout 19 miles
- 92065 Ramonaabout 23 miles
Distances are straight-line, between the approximate centres of each delivery area.
Got a call from a California number?
Enter the full 10-digit number to see who it is listed to, where it is registered, and whether it is a mobile, landline or VoIP line.
Frequently asked questions
Where is ZIP code 92143?
ZIP code 92143 is in San Ysidro, California, in San Diego County. ZIP codes are mail delivery routes rather than mapped regions, so the code identifies a set of addresses the Postal Service serves together, not a district with fixed borders.
What county is 92143 in?
92143 is in San Diego County, California. A single ZIP code can straddle a county line, because mail routes were drawn for delivery efficiency and take no notice of county boundaries, so the county shown is the one the code is primarily associated with.
What area code goes with ZIP code 92143?
ZIP codes and telephone area codes are separate systems with different boundaries, so no ZIP code maps to exactly one area code. California uses 37 geographic area codes: 209, 213, 279, 310, 323, 341, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 627, 628, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 820, 831, 858, 909, 916, 925, 949 and 951.
How many ZIP codes does San Ysidro have?
San Ysidro, California has 2 ZIP codes in this dataset, of which 92143 is one. Large cities are split across many codes so mail can be sorted by district, and the codes are usually numerically close to each other.
Is 92143 a real ZIP code?
Yes. 92143 appears in the GeoNames postal-code dataset as an active US code assigned to San Ysidro, California. Codes that have been retired or never issued do not appear, which is why entering one on this site returns a not-found page rather than a blank record.
Why do ZIP code boundaries look odd on maps?
Because they are not boundaries. A ZIP code is a collection of mail routes, and a route is a line a carrier walks or drives, not an area. Any ZIP code map you have seen is somebody's approximation drawn around the addresses in a code, which is also why two ZIP code maps rarely agree with each other.
Can two addresses in the same ZIP code be in different cities?
Yes, routinely. The Postal Service assigns a preferred city name to each code for addressing purposes, and that name often covers several neighbouring towns, unincorporated areas or a whole postal district. The place shown here is the one the source names for the code, not a claim that every address in it is inside that town's limits.
ZIP code, place, county and location data from GeoNames, used under CC BY 4.0, extracted 2026-08-22. ZIP codes are Postal Service delivery routes, not administrative areas, so a code can cross city and county lines and the place name shown is the one the source records for the code. Coordinates are an approximate centre of the delivery area, not a precise location. Population and time zone are not shown because the source does not publish them.