What is an A-number?

A-number or A# stands for “alien number”; it is a unique 8 or 9 digit number assigned to a noncitizen by the Department of Homeland Security (DHS) upon the creation of a file. For most unaccompanied minors (UC) they will receive this number when they are detained at the border by Customs and Border Patrol (CBP). This number appears on most documents produced for the child at the border and shelter.

Why is your A-number important?

The A-number is a unique number that you will need when searching for information on the status of immigration court proceedings with EOIR and pending immigrant applications with USCIS.

How do I find my A-number?

The A-Number begins with the letter “A” and is followed by an 8 or 9 digit number. This number is printed in all DHS and EOIR correspondence. You can find an A-number on many forms you may have, for example:

For more examples, download this PDF of various immigration forms with the A-Number locations circled.

Check if you have a scheduled hearing using the EOIR Automated Case Information webpage [EN].