ZIP Code 89403 — Dayton, NV
89403 is a standard (street delivery) ZIP code serving Dayton, Nevada, in Lyon 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 89403 at a glance
| ZIP code | 89403 |
|---|---|
| Primary city | Dayton |
| State | Nevada (NV) |
| County | Lyon FIPS 32019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 17,506 |
| Coordinates | 39.258380, -119.486330 |
How ZIP+4 works in 89403
The four digits after the hyphen encode a delivery segment inside 89403. 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 89403 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 89403.
| ZIP | City | Distance |
|---|---|---|
| 89428 | Silver City, NV | 7.7 mi |
| 89440 | Virginia City, NV | 9.7 mi |
| 89706 | Carson City, NV | 11.7 mi |
| 89429 | Silver Springs, NV | 12.7 mi |
| 89521 | Reno, NV | 12.8 mi |
| 89701 | Carson City, NV | 15 mi |
| 89437 | Sparks, NV | 16.8 mi |
| 89704 | Washoe Valley, NV | 17.7 mi |
| 89434 | Sparks, NV | 19.6 mi |
| 89703 | Carson City, NV | 20.7 mi |
| 89502 | Reno, NV | 21.4 mi |
| 89423 | Minden, NV | 21.8 mi |
Questions about 89403
What is the ZIP+4 code for 89403?
89403 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 89403, you need to look up a specific street address to get them.
What city is 89403?
89403 is assigned to Dayton, Nevada, in Lyon 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.