ZIP Code 94089 — Sunnyvale, CA
94089 is a standard (street delivery) ZIP code serving Sunnyvale, California, in Santa Clara County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 94089 at a glance
| ZIP code | 94089 |
|---|---|
| Primary city | Sunnyvale |
| State | California (CA) |
| County | Santa Clara FIPS 06085 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 22,699 |
| Coordinates | 37.411920, -122.014410 |
How ZIP+4 works in 94089
The four digits after the hyphen encode a delivery segment inside 94089. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 94089 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Sunnyvale
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 94089.
| ZIP | City | Distance |
|---|---|---|
| 94085 | Sunnyvale, CA | 1.6 mi |
| 95002 | Alviso, CA | 2.1 mi |
| 94086 | Sunnyvale, CA | 2.8 mi |
| 94043 | Mountain View, CA | 3 mi |
| 95054 | Santa Clara, CA | 3 mi |
| 94041 | Mountain View, CA | 3.7 mi |
| 95134 | San Jose, CA | 4 mi |
| 94087 | Sunnyvale, CA | 4.3 mi |
| 94040 | Mountain View, CA | 4.5 mi |
| 95051 | Santa Clara, CA | 4.7 mi |
| 95050 | Santa Clara, CA | 5.4 mi |
| 95053 | Santa Clara, CA | 6.1 mi |
Questions about 94089
What is the ZIP+4 code for 94089?
94089 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 94089, you need to look up a specific street address to get them.
What city is 94089?
94089 is assigned to Sunnyvale, California, in Santa Clara County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.