ZIP Code 65230 — Armstrong, MO
65230 is a standard (street delivery) ZIP code serving Armstrong, Missouri, in Howard 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 65230 at a glance
| ZIP code | 65230 |
|---|---|
| Primary city | Armstrong |
| State | Missouri (MO) |
| County | Howard FIPS 29089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 591 |
| Coordinates | 39.287150, -92.692180 |
How ZIP+4 works in 65230
The four digits after the hyphen encode a delivery segment inside 65230. 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 65230 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 65230.
| ZIP | City | Distance |
|---|---|---|
| 65257 | Higbee, MO | 8.6 mi |
| 65254 | Glasgow, MO | 10 mi |
| 65248 | Fayette, MO | 10.3 mi |
| 65281 | Salisbury, MO | 13.3 mi |
| 65244 | Clifton Hill, MO | 13.5 mi |
| 65259 | Huntsville, MO | 14.4 mi |
| 65330 | Gilliam, MO | 14.5 mi |
| 65278 | Renick, MO | 15.4 mi |
| 65256 | Harrisburg, MO | 16.8 mi |
| 65246 | Dalton, MO | 17.6 mi |
| 65261 | Keytesville, MO | 17.9 mi |
| 65270 | Moberly, MO | 18 mi |
Questions about 65230
What is the ZIP+4 code for 65230?
65230 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 65230, you need to look up a specific street address to get them.
What city is 65230?
65230 is assigned to Armstrong, Missouri, in Howard 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.