ZIP Code 37870 — Speedwell, TN
37870 is a standard (street delivery) ZIP code serving Speedwell, Tennessee, in Claiborne 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 37870 at a glance
| ZIP code | 37870 |
|---|---|
| Primary city | Speedwell |
| State | Tennessee (TN) |
| County | Claiborne FIPS 47025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,385 |
| Coordinates | 36.463190, -83.835620 |
How ZIP+4 works in 37870
The four digits after the hyphen encode a delivery segment inside 37870. 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 37870 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 37870.
| ZIP | City | Distance |
|---|---|---|
| 37851 | Pruden, TN | 7.5 mi |
| 37866 | Sharps Chapel, TN | 7.8 mi |
| 37825 | New Tazewell, TN | 9.2 mi |
| 37715 | Clairfield, TN | 9.2 mi |
| 37724 | Cumberland Gap, TN | 9.7 mi |
| 37730 | Eagan, TN | 10.5 mi |
| 40940 | Frakes, KY | 11.4 mi |
| 37729 | Duff, TN | 11.5 mi |
| 40965 | Middlesboro, KY | 12.5 mi |
| 37766 | La Follette, TN | 13.9 mi |
| 37807 | Maynardville, TN | 14.1 mi |
| 37888 | Washburn, TN | 16.2 mi |
Questions about 37870
What is the ZIP+4 code for 37870?
37870 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 37870, you need to look up a specific street address to get them.
What city is 37870?
37870 is assigned to Speedwell, Tennessee, in Claiborne 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.