Holtsville zipcode
| City | Holtsville |
| ZIP Code | 00544 |
| Type | Company/Organization |
| State Code | NY |
| State | New York |
ZIP code of Holtsville is 00544. This place is located in New York state in US. To send any postal service to Holtsville, you must use 00544 zipcode.
You should avoid following 1 city name of New York to be used with the ZIP code 00544.
- Internal Revenue Service, NY