Holtsville, NYZIP code 00501 belongs to Holtsville, New York, and serves as the unique code for the Internal Revenue Service (IRS) center. Located within this ZIP code is the main post office that primarily processes federal tax returns. As a designated IRS location, it plays a crucial role in administering tax-related services for residents and businesses across the United States. |
ZIP code 00501Holtsville, NYUnited StatesUS > NY > Suffolk County > 00501 Daylight Saving:
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