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  • United States Postal Service

    • Mailing Services
    770 Massachusetts Avenue
    Cambridge, MA 02139-9998
    (617) 575-8700
    (617) 575-8701 (fax)
    • About

      A self-supporting, independent federal agency, the U.S. Postal Service is the only delivery service that reaches every address in the nation: 155 million residences, businesses and Post Office Boxes. The Postal Service receives no tax dollars for operating expenses and relies on the sale of postage, products and services to fund its operations.

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