ZIP Code 39666 — Summit, MS
39666 is a standard (street delivery) ZIP code serving Summit, Mississippi, in Pike 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 39666 at a glance
| ZIP code | 39666 |
|---|---|
| Primary city | Summit |
| State | Mississippi (MS) |
| County | Pike FIPS 28113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 11,408 |
| Coordinates | 31.285300, -90.488570 |
How ZIP+4 works in 39666
The four digits after the hyphen encode a delivery segment inside 39666. 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 39666 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 39666.
| ZIP | City | Distance |
|---|---|---|
| 39635 | Fernwood, MS | 7.4 mi |
| 39648 | Mccomb, MS | 9.1 mi |
| 39629 | Bogue Chitto, MS | 10.6 mi |
| 39664 | Smithdale, MS | 11.8 mi |
| 39652 | Magnolia, MS | 12.1 mi |
| 39662 | Ruth, MS | 13.3 mi |
| 39657 | Osyka, MS | 17.8 mi |
| 39601 | Brookhaven, MS | 19.3 mi |
| 39641 | Jayess, MS | 19.4 mi |
| 39645 | Liberty, MS | 20.3 mi |
| 39647 | Mccall Creek, MS | 20.7 mi |
| 39667 | Tylertown, MS | 23.9 mi |
Questions about 39666
What is the ZIP+4 code for 39666?
39666 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 39666, you need to look up a specific street address to get them.
What city is 39666?
39666 is assigned to Summit, Mississippi, in Pike 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.