ZIP Code 64631 — Bucklin, MO
64631 is a standard (street delivery) ZIP code serving Bucklin, Missouri, in Linn 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 64631 at a glance
| ZIP code | 64631 |
|---|---|
| Primary city | Bucklin |
| State | Missouri (MO) |
| County | Linn FIPS 29115 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 836 |
| Coordinates | 39.820180, -92.882130 |
How ZIP+4 works in 64631
The four digits after the hyphen encode a delivery segment inside 64631. 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 64631 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 64631.
| ZIP | City | Distance |
|---|---|---|
| 63558 | New Cambria, MO | 8.8 mi |
| 64628 | Brookfield, MO | 9 mi |
| 63539 | Ethel, MO | 9.6 mi |
| 64658 | Marceline, MO | 11.2 mi |
| 63557 | New Boston, MO | 11.2 mi |
| 63534 | Callao, MO | 13.5 mi |
| 63538 | Elmer, MO | 14.4 mi |
| 64676 | Rothville, MO | 14.5 mi |
| 63566 | Winigan, MO | 15 mi |
| 64651 | Laclede, MO | 16.1 mi |
| 63532 | Bevier, MO | 16.7 mi |
| 64674 | Purdin, MO | 17.7 mi |
Questions about 64631
What is the ZIP+4 code for 64631?
64631 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 64631, you need to look up a specific street address to get them.
What city is 64631?
64631 is assigned to Bucklin, Missouri, in Linn 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.