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St. Lawrence County Zip Codes



County State Zip Code City Area Codes
St. Lawrence County NY 13652 Hermon 315, 680
St. Lawrence County NY 13654 Heuvelton 315, 680
St. Lawrence County NY 13658 Lisbon 315, 343, 613, 680, 753
St. Lawrence County NY 13660 Madrid 315, 680
St. Lawrence County NY 13662 Massena 315, 343, 518, 613, 680, 753, 838
St. Lawrence County NY 13664 Morristown 315, 680
St. Lawrence County NY 13666 Newton Falls 315, 518, 680, 838
St. Lawrence County NY 13667 Norfolk 315, 680
St. Lawrence County NY 13668 Norwood 315, 680
St. Lawrence County NY 13669 Ogdensburg 315, 343, 613, 680, 753
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ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.

ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.

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