U.S. POSTAL CODE DIRECTORY

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Directory coverage 42,735 ZIP Code records

Somerset County Zip Codes

County	State	Zip Code	City	Area Codes
Somerset County	MD	21838	Marion Station	410, 443, 667, 757, 948
Somerset County	MD	21853	Princess Anne	410, 443, 667
Somerset County	MD	21857	Rehobeth	410
Somerset County	MD	21866	Tylerton	410, 443, 667
Somerset County	MD	21867	Upper Fairmount	410, 443, 667
Somerset County	MD	21871	Westover	410, 443, 667
Somerset County	MD	21890	Westover	410, 443, 667

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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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