ZIP Code 63534 — Callao, MO
63534 is a standard (street delivery) ZIP code serving Callao, Missouri, in Macon 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 63534 at a glance
| ZIP code | 63534 |
|---|---|
| Primary city | Callao |
| State | Missouri (MO) |
| County | Macon FIPS 29121 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 652 |
| Coordinates | 39.740610, -92.648380 |
How ZIP+4 works in 63534
The four digits after the hyphen encode a delivery segment inside 63534. 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 63534 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 63534.
| ZIP | City | Distance |
|---|---|---|
| 63532 | Bevier, MO | 4.4 mi |
| 63558 | New Cambria, MO | 5.5 mi |
| 63552 | Macon, MO | 10.5 mi |
| 65247 | Excello, MO | 11.8 mi |
| 64631 | Bucklin, MO | 13.6 mi |
| 63539 | Ethel, MO | 14.4 mi |
| 63538 | Elmer, MO | 14.7 mi |
| 64658 | Marceline, MO | 15.5 mi |
| 63530 | Atlanta, MO | 15.6 mi |
| 65260 | Jacksonville, MO | 16.8 mi |
| 63431 | Anabel, MO | 17 mi |
| 65244 | Clifton Hill, MO | 17.9 mi |
Questions about 63534
What is the ZIP+4 code for 63534?
63534 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 63534, you need to look up a specific street address to get them.
What city is 63534?
63534 is assigned to Callao, Missouri, in Macon 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.