ZIP Code 41643 — Lackey, KY
41643 is a standard (street delivery) ZIP code serving Lackey, Kentucky, in Knott 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 41643 at a glance
| ZIP code | 41643 |
|---|---|
| Primary city | Lackey |
| State | Kentucky (KY) |
| County | Knott FIPS 21119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 134 |
| Coordinates | 37.437780, -82.843070 |
How ZIP+4 works in 41643
The four digits after the hyphen encode a delivery segment inside 41643. 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 41643 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 41643.
| ZIP | City | Distance |
|---|---|---|
| 41630 | Garrett, KY | 1.9 mi |
| 41666 | Wayland, KY | 2 mi |
| 41839 | Mousie, KY | 2.2 mi |
| 41861 | Raven, KY | 3.4 mi |
| 41859 | Dema, KY | 4.5 mi |
| 41651 | Minnie, KY | 5.2 mi |
| 41640 | Hueysville, KY | 5.3 mi |
| 41622 | Eastern, KY | 5.6 mi |
| 41817 | Garner, KY | 6.3 mi |
| 41619 | Drift, KY | 6.4 mi |
| 41636 | Hi Hat, KY | 6.7 mi |
| 41831 | Leburn, KY | 6.7 mi |
Questions about 41643
What is the ZIP+4 code for 41643?
41643 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 41643, you need to look up a specific street address to get them.
What city is 41643?
41643 is assigned to Lackey, Kentucky, in Knott 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.