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where to find alien registration number

You can usually find your Alien Registration Number (A‑Number) on several official U.S. immigration documents; it is often labeled as “A‑Number,” “A#,” or “USCIS#” and is 7–9 digits long.

Where to Find Your Alien Registration Number (A‑Number)

1. Check these main documents first

On most modern documents, your A‑Number is shown as USCIS# near your name or photo.

  • Green Card (Permanent Resident Card, Form I‑551)
    • For cards issued after May 10, 2010, the A‑Number is on the front , usually next to your photo, labeled “USCIS#”.
* It may also appear on the **back** of the card after the country code.
  • Employment Authorization Document (EAD / Work Permit)
    • On the front of the card, find “USCIS#” ; that number is your Alien Registration Number.
  • Immigrant Visa in Your Passport (Visa Foil/Stamp)
    • Shows an entry called “Registration Number” or similar on the right side, often below the case number; that is your A‑Number.
  • Form I‑797 (Notices from USCIS)
    • On some I‑797 approval or receipt notices , your A‑Number appears as “USCIS#” or in a field labeled “Alien Number” , near the top of the notice.
  • Immigrant Data Summary / Immigrant Fee Handout
    • If you processed through a U.S. embassy or consulate, your Immigrant Data Summary and Immigrant Fee Handout usually have your A‑Number at the top, near your name.

2. If you use an online USCIS account

Many applicants now have USCIS online accounts.

  • When you log in, download your notices and receipts ; the A‑Number often appears on those PDFs as USCIS# or Alien Number.
  • Your profile in the account may also list the A‑Number as part of your personal information.

3. If you still can’t find it

If you know you should have an A‑Number but cannot locate it:

  • Check every USCIS or embassy letter you have (biometrics notice, approval/denial notices, fee handouts, etc.); it is usually printed near your name and date of birth.
  • As a last resort, you can request your records from USCIS using a FOIA request (Form G‑639) to obtain your A‑Number, but this can take several weeks.

4. Quick mini‑story to visualize it

Imagine you open your wallet and pull out your green card. Right under your photo, you see a line that says “USCIS# 123‑456‑789” – that 7–9 digit code is your Alien Registration Number , and you’ll see that same number repeated on your EAD, immigrant visa, and USCIS notices.

5. Important notes

  • The A‑Number is permanent ; it stays the same even if your card is renewed or replaced.
  • It is not the same as your USCIS receipt/case number , which is 13 characters and starts with three letters (like “MSC123…” or “WAC123…”).
  • Keep it stored safely (for example, in a secure digital vault or safe), because mistakes or losing track of it can cause delays in your immigration processes.

TL;DR:
Look for a 7–9 digit number labeled A‑Number , A# , or USCIS# on your green card, EAD, immigrant visa stamp, USCIS notices (I‑797), or immigrant data/fee documents; if still missing, use a FOIA request to get it.

Information gathered from public forums or data available on the internet and portrayed here.