ZIP Code 64440 — De Kalb, MO
64440 is a standard (street delivery) ZIP code serving De Kalb, Missouri, in Buchanan 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 64440 at a glance
| ZIP code | 64440 |
|---|---|
| Primary city | De Kalb |
| State | Missouri (MO) |
| County | Buchanan FIPS 29021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 900 |
| Coordinates | 39.578490, -94.918410 |
How ZIP+4 works in 64440
The four digits after the hyphen encode a delivery segment inside 64440. 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 64440 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 64440.
| ZIP | City | Distance |
|---|---|---|
| 64448 | Faucett, MO | 5.6 mi |
| 64484 | Rushville, MO | 5.6 mi |
| 64504 | Saint Joseph, MO | 7.4 mi |
| 64098 | Weston, MO | 8.5 mi |
| 64439 | Dearborn, MO | 9.7 mi |
| 64401 | Agency, MO | 11.5 mi |
| 66002 | Atchison, KS | 11.9 mi |
| 64503 | Saint Joseph, MO | 12.4 mi |
| 66024 | Elwood, KS | 12.9 mi |
| 64018 | Camden Point, MO | 13.2 mi |
| 64501 | Saint Joseph, MO | 13.5 mi |
| 64507 | Saint Joseph, MO | 13.7 mi |
Questions about 64440
What is the ZIP+4 code for 64440?
64440 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 64440, you need to look up a specific street address to get them.
What city is 64440?
64440 is assigned to De Kalb, Missouri, in Buchanan 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.