ZIP Code 28403 — Wilmington, NC
28403 is a standard (street delivery) ZIP code serving Wilmington, North Carolina, in New Hanover 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 28403 at a glance
| ZIP code | 28403 |
|---|---|
| Primary city | Wilmington |
| State | North Carolina (NC) |
| County | New Hanover FIPS 37129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 40,319 |
| Coordinates | 34.221770, -77.879020 |
How ZIP+4 works in 28403
The four digits after the hyphen encode a delivery segment inside 28403. 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 28403 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.
Other ZIP codes in Wilmington
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 28403.
| ZIP | City | Distance |
|---|---|---|
| 28405 | Wilmington, NC | 3 mi |
| 28480 | Wrightsville Beach, NC | 4.5 mi |
| 28409 | Wilmington, NC | 4.9 mi |
| 28412 | Wilmington, NC | 6.5 mi |
| 28401 | Wilmington, NC | 7.1 mi |
| 28411 | Wilmington, NC | 7.4 mi |
| 28429 | Castle Hayne, NC | 8.4 mi |
| 28479 | Winnabow, NC | 11.7 mi |
| 28428 | Carolina Beach, NC | 12.8 mi |
| 28451 | Leland, NC | 13.5 mi |
| 28457 | Rocky Point, NC | 16.2 mi |
| 28449 | Kure Beach, NC | 16.8 mi |
Questions about 28403
What is the ZIP+4 code for 28403?
28403 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 28403, you need to look up a specific street address to get them.
What city is 28403?
28403 is assigned to Wilmington, North Carolina, in New Hanover 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.