ZIP Code 27816 — Castalia, NC
27816 is a standard (street delivery) ZIP code serving Castalia, North Carolina, in Franklin 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 27816 at a glance
| ZIP code | 27816 |
|---|---|
| Primary city | Castalia |
| State | North Carolina (NC) |
| County | Franklin FIPS 37069 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,019 |
| Coordinates | 36.107320, -78.072450 |
How ZIP+4 works in 27816
The four digits after the hyphen encode a delivery segment inside 27816. 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 27816 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 27816.
| ZIP | City | Distance |
|---|---|---|
| 27856 | Nashville, NC | 8.4 mi |
| 27549 | Louisburg, NC | 9.5 mi |
| 27844 | Hollister, NC | 11.7 mi |
| 27882 | Spring Hope, NC | 11.7 mi |
| 27508 | Bunn, NC | 14.3 mi |
| 27804 | Rocky Mount, NC | 14.9 mi |
| 27589 | Warrenton, NC | 16 mi |
| 27891 | Whitakers, NC | 18.5 mi |
| 27803 | Rocky Mount, NC | 19 mi |
| 27809 | Battleboro, NC | 19.5 mi |
| 27807 | Bailey, NC | 20.6 mi |
| 27823 | Enfield, NC | 21 mi |
Questions about 27816
What is the ZIP+4 code for 27816?
27816 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 27816, you need to look up a specific street address to get them.
What city is 27816?
27816 is assigned to Castalia, North Carolina, in Franklin 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.