ZIP Code 13863 — Willet, NY
13863 is a standard (street delivery) ZIP code serving Willet, New York, in Cortland 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 13863 at a glance
| ZIP code | 13863 |
|---|---|
| Primary city | Willet |
| State | New York (NY) |
| County | Cortland FIPS 36023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 382 |
| Coordinates | 42.441640, -75.904000 |
How ZIP+4 works in 13863
The four digits after the hyphen encode a delivery segment inside 13863. 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 13863 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 13863.
| ZIP | City | Distance |
|---|---|---|
| 13841 | Smithville Flats, NY | 3.7 mi |
| 13862 | Whitney Point, NY | 7.4 mi |
| 13801 | Mcdonough, NY | 7.6 mi |
| 13803 | Marathon, NY | 8 mi |
| 13040 | Cincinnatus, NY | 8.3 mi |
| 13778 | Greene, NY | 9.8 mi |
| 13797 | Lisle, NY | 10.6 mi |
| 13136 | Pitcher, NY | 11.6 mi |
| 13746 | Chenango Forks, NY | 12.7 mi |
| 13777 | Glen Aubrey, NY | 13.3 mi |
| 13101 | Mcgraw, NY | 13.8 mi |
| 13738 | Blodgett Mills, NY | 13.8 mi |
Questions about 13863
What is the ZIP+4 code for 13863?
13863 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 13863, you need to look up a specific street address to get them.
What city is 13863?
13863 is assigned to Willet, New York, in Cortland 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.