ZIP Code 63866 — Marston, MO
63866 is a standard (street delivery) ZIP code serving Marston, Missouri, in New Madrid 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 63866 at a glance
| ZIP code | 63866 |
|---|---|
| Primary city | Marston |
| State | Missouri (MO) |
| County | New Madrid FIPS 29143 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 409 |
| Coordinates | 36.526060, -89.606540 |
How ZIP+4 works in 63866
The four digits after the hyphen encode a delivery segment inside 63866. 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 63866 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 63866.
| ZIP | City | Distance |
|---|---|---|
| 63862 | Lilbourn, MO | 5.8 mi |
| 63873 | Portageville, MO | 7.4 mi |
| 63869 | New Madrid, MO | 8.9 mi |
| 63860 | Kewanee, MO | 10.3 mi |
| 63833 | Catron, MO | 10.8 mi |
| 38079 | Tiptonville, TN | 10.8 mi |
| 63874 | Risco, MO | 11.8 mi |
| 63878 | Tallapoosa, MO | 12.1 mi |
| 63870 | Parma, MO | 14.7 mi |
| 63867 | Matthews, MO | 15.5 mi |
| 38077 | Wynnburg, TN | 15.5 mi |
| 63879 | Wardell, MO | 16.2 mi |
Questions about 63866
What is the ZIP+4 code for 63866?
63866 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 63866, you need to look up a specific street address to get them.
What city is 63866?
63866 is assigned to Marston, Missouri, in New Madrid 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.