Originally published at: Where Is My Alien Registration Number or A number? - USA
What is A number? An alien number, commonly known as ‘A number’ is assigned to each person who intends to immigrate to the USA. This 7 to 9-digit number, prefixed with the letter ‘A’ can be found in various documents that have been issued to you by USCIS. The 9-digit USCIS number printed on US…