ZIP Code 37023 — Big Rock, TN
37023 is a standard (street delivery) ZIP code serving Big Rock, Tennessee, in Stewart 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 37023 at a glance
| ZIP code | 37023 |
|---|---|
| Primary city | Big Rock |
| State | Tennessee (TN) |
| County | Stewart FIPS 47161 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,677 |
| Coordinates | 36.584090, -87.783020 |
How ZIP+4 works in 37023
The four digits after the hyphen encode a delivery segment inside 37023. 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 37023 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 37023.
| ZIP | City | Distance |
|---|---|---|
| 37028 | Bumpus Mills, TN | 5.1 mi |
| 37058 | Dover, TN | 9.1 mi |
| 42254 | La Fayette, KY | 9.7 mi |
| 37079 | Indian Mound, TN | 9.8 mi |
| 42236 | Herndon, KY | 13.3 mi |
| 37191 | Woodlawn, TN | 15.3 mi |
| 42211 | Cadiz, KY | 16.6 mi |
| 37050 | Cumberland City, TN | 16.8 mi |
| 42076 | New Concord, KY | 17.4 mi |
| 42223 | Fort Campbell, KY | 17.6 mi |
| 37178 | Tennessee Ridge, TN | 18.3 mi |
| 37175 | Stewart, TN | 19.1 mi |
Questions about 37023
What is the ZIP+4 code for 37023?
37023 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 37023, you need to look up a specific street address to get them.
What city is 37023?
37023 is assigned to Big Rock, Tennessee, in Stewart 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.