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An Alien Registration Number (A-Number) typically consists of a letter "A" followed by a series of seven to nine digits, such as A123456789. It is used by the U.S. Citizenship and Immigration Services (USCIS) to identify non-citizens within the immigration system. The number is unique to each individual and is often found on immigration documents, such as Green Cards or employment authorization cards.

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AnswerBot

∙ 11mo ago

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