ZIP Code 58343 — Knox, ND
58343 is a standard (street delivery) ZIP code serving Knox, North Dakota, in Benson 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 58343 at a glance
| ZIP code | 58343 |
|---|---|
| Primary city | Knox |
| State | North Dakota (ND) |
| County | Benson FIPS 38005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 67 |
| Coordinates | 48.296430, -99.725830 |
How ZIP+4 works in 58343
The four digits after the hyphen encode a delivery segment inside 58343. 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 58343 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 58343.
| ZIP | City | Distance |
|---|---|---|
| 58386 | York, ND | 6.3 mi |
| 58385 | Wolford, ND | 13 mi |
| 58346 | Leeds, ND | 13.9 mi |
| 58368 | Rugby, ND | 14.8 mi |
| 58313 | Balta, ND | 16.9 mi |
| 58332 | Esmond, ND | 17.4 mi |
| 58310 | Agate, ND | 21.2 mi |
| 58351 | Minnewaukan, ND | 23.2 mi |
| 58353 | Mylo, ND | 24.4 mi |
| 58348 | Maddock, ND | 25.3 mi |
| 58366 | Rolette, ND | 25.4 mi |
| 58325 | Churchs Ferry, ND | 26.2 mi |
Questions about 58343
What is the ZIP+4 code for 58343?
58343 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 58343, you need to look up a specific street address to get them.
What city is 58343?
58343 is assigned to Knox, North Dakota, in Benson 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.