ZIP Code 28399 — White Oak, NC
28399 is a standard (street delivery) ZIP code serving White Oak, North Carolina, in Bladen 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 28399 at a glance
| ZIP code | 28399 |
|---|---|
| Primary city | White Oak |
| State | North Carolina (NC) |
| County | Bladen FIPS 37017 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,819 |
| Coordinates | 34.778850, -78.729530 |
How ZIP+4 works in 28399
The four digits after the hyphen encode a delivery segment inside 28399. 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 28399 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 28399.
| ZIP | City | Distance |
|---|---|---|
| 28392 | Tar Heel, NC | 4.8 mi |
| 28332 | Dublin, NC | 8.4 mi |
| 28312 | Fayetteville, NC | 11.6 mi |
| 28337 | Elizabethtown, NC | 11.9 mi |
| 28384 | Saint Pauls, NC | 12.6 mi |
| 28348 | Hope Mills, NC | 14.6 mi |
| 28306 | Fayetteville, NC | 15.5 mi |
| 28320 | Bladenboro, NC | 15.7 mi |
| 28441 | Garland, NC | 16.7 mi |
| 28358 | Lumberton, NC | 16.9 mi |
| 28371 | Parkton, NC | 17.2 mi |
| 28391 | Stedman, NC | 17.4 mi |
Questions about 28399
What is the ZIP+4 code for 28399?
28399 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 28399, you need to look up a specific street address to get them.
What city is 28399?
28399 is assigned to White Oak, North Carolina, in Bladen 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.