ZIP Code 63557 — New Boston, MO
63557 is a standard (street delivery) ZIP code serving New Boston, 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 63557 at a glance
| ZIP code | 63557 |
|---|---|
| Primary city | New Boston |
| State | Missouri (MO) |
| County | Linn FIPS 29115 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 272 |
| Coordinates | 39.982970, -92.880450 |
How ZIP+4 works in 63557
The four digits after the hyphen encode a delivery segment inside 63557. 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 63557 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 63557.
| ZIP | City | Distance |
|---|---|---|
| 63566 | Winigan, MO | 4.9 mi |
| 63539 | Ethel, MO | 7.1 mi |
| 64631 | Bucklin, MO | 11.2 mi |
| 63538 | Elmer, MO | 11.2 mi |
| 64674 | Purdin, MO | 14.8 mi |
| 64630 | Browning, MO | 15 mi |
| 64628 | Brookfield, MO | 15.6 mi |
| 63558 | New Cambria, MO | 18 mi |
| 64653 | Linneus, MO | 18.2 mi |
| 63544 | Green Castle, MO | 18.2 mi |
| 63559 | Novinger, MO | 18.3 mi |
| 63556 | Milan, MO | 18.6 mi |
Questions about 63557
What is the ZIP+4 code for 63557?
63557 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 63557, you need to look up a specific street address to get them.
What city is 63557?
63557 is assigned to New Boston, 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.