ZIP Code 40115 — Custer, KY
40115 is a standard (street delivery) ZIP code serving Custer, Kentucky, in Breckinridge 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 40115 at a glance
| ZIP code | 40115 |
|---|---|
| Primary city | Custer |
| State | Kentucky (KY) |
| County | Breckinridge FIPS 21027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,012 |
| Coordinates | 37.737840, -86.227070 |
How ZIP+4 works in 40115
The four digits after the hyphen encode a delivery segment inside 40115. 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 40115 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 40115.
| ZIP | City | Distance |
|---|---|---|
| 40140 | Garfield, KY | 3.7 mi |
| 40145 | Hudson, KY | 8.1 mi |
| 40144 | Harned, KY | 8.3 mi |
| 40146 | Irvington, KY | 9 mi |
| 40175 | Vine Grove, KY | 9.5 mi |
| 42724 | Cecilia, KY | 9.9 mi |
| 40162 | Rineyville, KY | 10 mi |
| 40142 | Guston, KY | 10.5 mi |
| 42732 | Eastview, KY | 10.8 mi |
| 40178 | Westview, KY | 11.3 mi |
| 40117 | Ekron, KY | 12.5 mi |
| 42712 | Big Clifty, KY | 12.8 mi |
Questions about 40115
What is the ZIP+4 code for 40115?
40115 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 40115, you need to look up a specific street address to get them.
What city is 40115?
40115 is assigned to Custer, Kentucky, in Breckinridge 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.