ZIP Code 28509 — Alliance, NC
28509 is a standard (street delivery) ZIP code serving Alliance, North Carolina, in Pamlico 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 28509 at a glance
| ZIP code | 28509 |
|---|---|
| Primary city | Alliance |
| State | North Carolina (NC) |
| County | Pamlico FIPS 37137 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 17 |
| Coordinates | 35.145240, -76.806620 |
How ZIP+4 works in 28509
The four digits after the hyphen encode a delivery segment inside 28509. 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 28509 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 28509.
| ZIP | City | Distance |
|---|---|---|
| 28529 | Grantsboro, NC | 3.8 mi |
| 28515 | Bayboro, NC | 6.7 mi |
| 28571 | Oriental, NC | 7.7 mi |
| 28556 | Merritt, NC | 7.9 mi |
| 28587 | Vandemere, NC | 8.3 mi |
| 28560 | New Bern, NC | 9.6 mi |
| 28510 | Arapahoe, NC | 9.7 mi |
| 27806 | Aurora, NC | 10.8 mi |
| 28519 | Bridgeton, NC | 11.8 mi |
| 27821 | Edward, NC | 12.9 mi |
| 28527 | Ernul, NC | 14.4 mi |
| 28537 | Hobucken, NC | 15.9 mi |
Questions about 28509
What is the ZIP+4 code for 28509?
28509 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 28509, you need to look up a specific street address to get them.
What city is 28509?
28509 is assigned to Alliance, North Carolina, in Pamlico 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.