ZIP Code 11950 — Mastic, NY
11950 is a standard (street delivery) ZIP code serving Mastic, 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 11950 at a glance
| ZIP code | 11950 |
|---|---|
| Primary city | Mastic |
| State | New York (NY) |
| County | Suffolk FIPS 36103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 17,599 |
| Coordinates | 40.806270, -72.847340 |
How ZIP+4 works in 11950
The four digits after the hyphen encode a delivery segment inside 11950. 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 11950 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 11950.
| ZIP | City | Distance |
|---|---|---|
| 11955 | Moriches, NY | 1.3 mi |
| 11967 | Shirley, NY | 1.5 mi |
| 11934 | Center Moriches, NY | 2.8 mi |
| 11951 | Mastic Beach, NY | 2.8 mi |
| 11719 | Brookhaven, NY | 3.8 mi |
| 11980 | Yaphank, NY | 4.3 mi |
| 11973 | Upton, NY | 4.6 mi |
| 11940 | East Moriches, NY | 4.7 mi |
| 11949 | Manorville, NY | 4.7 mi |
| 11713 | Bellport, NY | 5.3 mi |
| 11941 | Eastport, NY | 6.7 mi |
| 11961 | Ridge, NY | 7.1 mi |
Questions about 11950
What is the ZIP+4 code for 11950?
11950 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 11950, you need to look up a specific street address to get them.
What city is 11950?
11950 is assigned to Mastic, 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.