ZIP Code 63377 — Silex, MO
63377 is a standard (street delivery) ZIP code serving Silex, Missouri, in Lincoln 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 63377 at a glance
| ZIP code | 63377 |
|---|---|
| Primary city | Silex |
| State | Missouri (MO) |
| County | Lincoln FIPS 29113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,501 |
| Coordinates | 39.110160, -91.100530 |
How ZIP+4 works in 63377
The four digits after the hyphen encode a delivery segment inside 63377. 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 63377 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 63377.
| ZIP | City | Distance |
|---|---|---|
| 63387 | Whiteside, MO | 6.8 mi |
| 63349 | Hawk Point, MO | 9.4 mi |
| 63344 | Eolia, MO | 9.6 mi |
| 63379 | Troy, MO | 9.7 mi |
| 63381 | Truxton, MO | 12.1 mi |
| 63333 | Bellflower, MO | 12.8 mi |
| 63359 | Middletown, MO | 13.6 mi |
| 63334 | Bowling Green, MO | 14.4 mi |
| 63343 | Elsberry, MO | 14.9 mi |
| 63362 | Moscow Mills, MO | 16.9 mi |
| 63336 | Clarksville, MO | 17.7 mi |
| 63347 | Foley, MO | 18.2 mi |
Questions about 63377
What is the ZIP+4 code for 63377?
63377 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 63377, you need to look up a specific street address to get them.
What city is 63377?
63377 is assigned to Silex, Missouri, in Lincoln 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.