ZIP Code 11703 — North Babylon, NY
11703 is a standard (street delivery) ZIP code serving North Babylon, New York, in Suffolk 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 11703 at a glance
| ZIP code | 11703 |
|---|---|
| Primary city | North Babylon |
| State | New York (NY) |
| County | Suffolk FIPS 36103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 17,187 |
| Coordinates | 40.733250, -73.325330 |
How ZIP+4 works in 11703
The four digits after the hyphen encode a delivery segment inside 11703. 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 11703 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 11703.
| ZIP | City | Distance |
|---|---|---|
| 11729 | Deer Park, NY | 2 mi |
| 11704 | West Babylon, NY | 2.1 mi |
| 11795 | West Islip, NY | 2.2 mi |
| 11798 | Wyandanch, NY | 2.9 mi |
| 11718 | Brightwaters, NY | 3.4 mi |
| 11757 | Lindenhurst, NY | 4 mi |
| 11706 | Bay Shore, NY | 4.7 mi |
| 11717 | Brentwood, NY | 5.2 mi |
| 11726 | Copiague, NY | 5.3 mi |
| 11735 | Farmingdale, NY | 5.6 mi |
| 11747 | Melville, NY | 5.6 mi |
| 11702 | Babylon, NY | 5.7 mi |
Questions about 11703
What is the ZIP+4 code for 11703?
11703 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 11703, you need to look up a specific street address to get them.
What city is 11703?
11703 is assigned to North Babylon, New York, in Suffolk 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.