An Alien Registration Number (“A-Number”, “Alien Number” or “USCIS Number”) is a 8 to 9 digit number that USCIS (U.S. Citizenship and Immigration Services) uses to identify immigrants who apply permanent residency in the United States.
On permanent resident card (green card), you can find Alien Registration Number on the front side. It is also embedded within the characters on the backside of card as well. The A-Number is listed in format “A000-000-000”, your A-Number is the letter “A” followed by 8 or 9 numbers (such as A012345678). USCIS uses A-Number to track immigration files. It is very important number and every immigrant individual gets this number.
You can find your A-Number on below listed documents:
You don’t need to do anything to get A-number. USCIS assigns an A-Number to all immigrants who apply for Permanent Resident Card (Green Card) or immigrant visa.
If your Green card is issued after May 10, 2010, then your Alien Registration Number (A-Number) is the same as your nine-digit USCIS# marked in this example:
If your Green Card is issued between 2004 and May 10, 2010, then your Alien Registration Number (A-Number) will appear on your card as shown below:
Your I-797C Notice of Action from USCIS contains your A-Number.
On Employment Authorization Document (work permit) card. A-Number is listed as “000-000-811” underneath USCIS#.
If green card is applied through consular processing (applied for green card at a U.S. embassy or consulate), then it will be on Data Summary stapled to the front of your immigrant visa package. You can find A-Number at the top of the Immigrant Data Summary.
If green card is applied through consular processing, the immigration officer probably gave you a USCIS Immigrant Fee handout. This document includes your A-Number in the top right corner.
You can also find A number on Immigrant Visa.
USCIS Alien number on I-140 approval notice.
Normally, the A-Number is not listed on an H-1B receipt notice or approval notice. However, if your employer files H-1B visa for you (typically H-1B extension) after your I-140 is already approved, the receipt notice will have the A-Number. It will be listed under the “BENFICIARY” column, where it will have both your A-Number as well as your name. In such a case, the H-4 visa receipt notice will still not have an A-Number.
