Feb 9, 2026 · An Alien Registration Number—also called an A-Number—is a seven-to-nine-digit number assigned to green card holders by the Department of Homeland Security. Typically, nonimmigrants in …

Oct 2, 2025 · Discover what an alien registration number (A‑Number) is, how to find it, and when USCIS requires it on immigration forms.

What is an Alien Registration Number? Your Alien Registration Number is a unique identifier provided by the U.S. government to non-citizens who are seeking permanent residency. It consists of 7 to 9 digits …

A unique seven-, eight- or nine-digit number that the Department of Homeland Security assigned to an alien. Also see USCIS Number.

Jun 25, 2025 · In this guide, we’ll break down everything you need to know about the alien registration number, what it is, who gets one, and exactly where to find your A-Number on official documents like …

After your initial application for a green card, you’ll be asked to provide your Alien Registration Number (also called an “A-number,” “A#,” or “USCIS number”) on any forms or petitions you file with U.S. …

One of the most common points of confusion is that it is sometimes labeled “A#”, “Alien Number”, or simply “USCIS #”. The table below breaks down where to find it on the most common forms.

Dec 20, 2024 · In this detailed guide, we’ll cover everything you need to know about the Alien Registration Number, its uses, how to find it, and why it’s crucial for immigrants in the United States.

Your Alien Registration Number—often called an A-Number, USCIS Number, or A#—is one of the most critical identifiers in your U.S. immigration journey. Yet many applicants find this simple nine-digit …

In this comprehensive guide, we’ll delve into Alien Registration Numbers’ significance, structure, and functionality, shedding light on their importance in the immigration landscape.