ZIP Code 64401 — Agency, MO
64401 is a standard (street delivery) ZIP code serving Agency, 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 64401 at a glance
| ZIP code | 64401 |
|---|---|
| Primary city | Agency |
| State | Missouri (MO) |
| County | Buchanan FIPS 29021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,757 |
| Coordinates | 39.634520, -94.715220 |
How ZIP+4 works in 64401
The four digits after the hyphen encode a delivery segment inside 64401. 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 64401 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 64401.
| ZIP | City | Distance |
|---|---|---|
| 64448 | Faucett, MO | 5.9 mi |
| 64454 | Gower, MO | 6.7 mi |
| 64507 | Saint Joseph, MO | 7.2 mi |
| 64439 | Dearborn, MO | 7.9 mi |
| 64443 | Easton, MO | 8.5 mi |
| 64503 | Saint Joseph, MO | 10.5 mi |
| 64504 | Saint Joseph, MO | 11.1 mi |
| 64444 | Edgerton, MO | 11.2 mi |
| 64501 | Saint Joseph, MO | 11.4 mi |
| 64440 | De Kalb, MO | 11.5 mi |
| 64506 | Saint Joseph, MO | 11.7 mi |
| 66024 | Elwood, KS | 12.3 mi |
Questions about 64401
What is the ZIP+4 code for 64401?
64401 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 64401, you need to look up a specific street address to get them.
What city is 64401?
64401 is assigned to Agency, 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.