ZIP Code 37729 — Duff, TN
37729 is a standard (street delivery) ZIP code serving Duff, Tennessee, in Campbell 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 37729 at a glance
| ZIP code | 37729 |
|---|---|
| Primary city | Duff |
| State | Tennessee (TN) |
| County | Campbell FIPS 47013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,279 |
| Coordinates | 36.514120, -84.032760 |
How ZIP+4 works in 37729
The four digits after the hyphen encode a delivery segment inside 37729. 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 37729 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 37729.
| ZIP | City | Distance |
|---|---|---|
| 37715 | Clairfield, TN | 4.9 mi |
| 37730 | Eagan, TN | 5 mi |
| 37762 | Jellico, TN | 6.6 mi |
| 37766 | La Follette, TN | 8.2 mi |
| 40940 | Frakes, KY | 8.7 mi |
| 37819 | Newcomb, TN | 10.3 mi |
| 37870 | Speedwell, TN | 11.5 mi |
| 40763 | Siler, KY | 13 mi |
| 37851 | Pruden, TN | 13.8 mi |
| 37847 | Pioneer, TN | 14.5 mi |
| 37866 | Sharps Chapel, TN | 15.1 mi |
| 40769 | Williamsburg, KY | 15.7 mi |
Questions about 37729
What is the ZIP+4 code for 37729?
37729 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 37729, you need to look up a specific street address to get them.
What city is 37729?
37729 is assigned to Duff, Tennessee, in Campbell 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.