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The HSN is a multipurpose international product terminology acknowledged by the World Customs Organization. The purpose of using the HSN codes is to ensure that GST billing practices are in accord with international standards of product nomenclature.
In the United States, a Social Security number (SSN) is a nine-digit number issued to U.S. citizens, permanent residents, and temporary (working) residents under section 205(c)(2) of the Social Security Act, codified as 42 U.S.C. Â§ 405(c)(2) .he applicant's mailing address does not have to be the same as their place of residence. Thus, the Area Number does not necessarily represent the State of residence of the applicant regardless of whether the card was issued prior to, or after, 1973. List of Social Security Area Numbers for Each State.