ZIP Code 63458 — Newark, MO
63458 is a standard (street delivery) ZIP code serving Newark, Missouri, in Knox 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 63458 at a glance
| ZIP code | 63458 |
|---|---|
| Primary city | Newark |
| State | Missouri (MO) |
| County | Knox FIPS 29103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 185 |
| Coordinates | 39.987510, -92.017450 |
How ZIP+4 works in 63458
The four digits after the hyphen encode a delivery segment inside 63458. 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 63458 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 63458.
| ZIP | City | Distance |
|---|---|---|
| 63434 | Bethel, MO | 6.6 mi |
| 63447 | La Belle, MO | 9.4 mi |
| 63460 | Novelty, MO | 10.2 mi |
| 63446 | Knox City, MO | 10.5 mi |
| 63469 | Shelbyville, MO | 10.8 mi |
| 63451 | Leonard, MO | 10.9 mi |
| 63537 | Edina, MO | 13.4 mi |
| 63440 | Ewing, MO | 14 mi |
| 63452 | Lewistown, MO | 14.3 mi |
| 63439 | Emden, MO | 15.2 mi |
| 63463 | Philadelphia, MO | 16.8 mi |
| 63438 | Durham, MO | 17.5 mi |
Questions about 63458
What is the ZIP+4 code for 63458?
63458 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 63458, you need to look up a specific street address to get them.
What city is 63458?
63458 is assigned to Newark, Missouri, in Knox 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.