ZIP Code 28138 — Rockwell, NC
28138 is a standard (street delivery) ZIP code serving Rockwell, North Carolina, in Rowan 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 28138 at a glance
| ZIP code | 28138 |
|---|---|
| Primary city | Rockwell |
| State | North Carolina (NC) |
| County | Rowan FIPS 37159 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 10,271 |
| Coordinates | 35.521210, -80.441930 |
How ZIP+4 works in 28138
The four digits after the hyphen encode a delivery segment inside 28138. 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 28138 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 28138.
| ZIP | City | Distance |
|---|---|---|
| 28041 | Faith, NC | 4.7 mi |
| 28072 | Granite Quarry, NC | 6.4 mi |
| 28071 | Gold Hill, NC | 6.8 mi |
| 28146 | Salisbury, NC | 7.4 mi |
| 28083 | Kannapolis, NC | 8.1 mi |
| 28124 | Mount Pleasant, NC | 8.5 mi |
| 28109 | Misenheimer, NC | 9.1 mi |
| 28023 | China Grove, NC | 9.6 mi |
| 28088 | Landis, NC | 9.8 mi |
| 28137 | Richfield, NC | 10.4 mi |
| 28025 | Concord, NC | 10.8 mi |
| 28039 | East Spencer, NC | 11 mi |
Questions about 28138
What is the ZIP+4 code for 28138?
28138 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 28138, you need to look up a specific street address to get them.
What city is 28138?
28138 is assigned to Rockwell, North Carolina, in Rowan 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.