Where Can I Find My Alien Number

You're staring at a government form. A-Number. Because of that, again. And there it is — that field asking for your Alien Registration Number. But uSCIS#. Whatever they're calling it today.

Your pulse ticks up. Where is it? Which document? And is it the same as your case number? Your receipt number? Practically speaking, your social security number? (Spoiler: it's none of those.

I've watched smart, organized people tear through folders, scroll through years of emails, and call lawyers in a panic over this nine-digit string. It's not complicated. But nobody explains it clearly in one place. So here we are.

What Is an Alien Number

The Alien Registration Number — A-Number for short — is a unique identifier USCIS assigns to non-citizens who interact with the U.S. Still, immigration system. Think of it like a Social Security number for your immigration file. Once you have one, it sticks with you for life. Green card? Same number. Consider this: naturalization? Same number. So future petitions? Same number.

It's usually seven, eight, or nine digits. Sometimes formatted with a leading "A" (A12345678). Sometimes just the digits. Same thing.

Not everyone gets one. Now, tourists on B-2 visas typically don't. That's why students on F-1 visas usually don't — unless they've applied for work authorization or adjustment of status. But if you've ever filed Form I-485, I-130, I-140, I-765, I-131, or had removal proceedings, you almost certainly have one.

It's Not Your Case Number

This is the single biggest confusion point. Your A-Number tracks you. So ) tracks a specific application. Day to day, different animals. Because of that, your receipt number (IOE1234567890, MSC1234567890, etc. Don't mix them up.

It's Not Your USCIS Online Account Number

That's a separate login credential. Useful for checking case status. Not your A-Number.

Why It Matters

You'll need your A-Number for:

• Filing new forms (I-90, I-751, N-400, I-130 for relatives, etc.)
• Checking case status online or by phone
• Scheduling InfoPass appointments (where those still exist)
• Communicating with USCIS, ICE, or EOIR
• Employment verification (some employers ask for it on I-9)
• FOIA requests for your own file
• Any interaction with immigration court

Losing track of it doesn't break your case. But it slows everything down. Every time you guess wrong, you risk a rejection notice (RFE) or a delayed biometrics appointment. And in immigration, delays compound.

Where to Find It — Document by Document

This is why you're here. Let's go through every common document that carries your A-Number, ranked from easiest to hardest.

Permanent Resident Card (Green Card)

Front side, right under "USCIS#". That's it. This leads to nine digits. Sometimes with the "A" prefix printed, sometimes not.

Older cards (pre-2010): Look on the back, near the magnetic stripe. Label varies — "Registration Number," "Alien #," or just a string of digits.

Conditional green cards (2-year): Same location. Same number. The conditions don't change your A-Number.

Employment Authorization Document (EAD / Work Permit)

Front of the card, under "USCIS#" or "Card#". Wait — "Card#" is not your A-Number on newer cards. Look for "USCIS#". That's the one.

On older EADs (pre-2017), it's labeled "Alien Registration Number" or "A#" on the front.

Form I-797 Approval Notice

Any I-797 (Notice of Action) that approves a benefit tied to your person — I-485 approval, I-140 approval, I-130 approval where you're the beneficiary — will show your A-Number in the top right corner, usually labeled "Alien Registration Number" or "A-Number".

Exception: I-797C receipt notices (the "we got your application" letter) often don't* show it unless one was already assigned. If this is your first filing ever, you won't see it here yet.

Form I-485 Receipt Notice (I-797C)

If you filed adjustment of status and didn't have an A-Number before, USCIS assigns one when they accept your I-485. It appears on the receipt notice (I-797C) in the top right. Label: "Alien Registration Number".

This is the moment many people get their first A-Number. So screenshot it. Day to day, save it. Write it on a sticky note inside your passport.

Continue exploring with our guides on what was the main purpose of the declaration of independence and is cold mountain a true story.

Immigrant Visa Stamp (In Your Passport)

If you entered on an immigrant visa (IV), flip to the visa foil. But the IV case number is different (starts with the consulate code like CDJ2023... In real terms, ). In practice, under "Registration Number" or "IV Case Number" — wait. Your A-Number is printed separately, often labeled "A-Number" or "Registration Number" near the bottom.

Form I-94 (Arrival/Departure Record)

Electronic I-94s (the norm since 2013) sometimes* show it. Practically speaking, gov/I94. In practice, look for "Alien Registration Number" field. Not always populated. Pull your record at cbp.Depends on your entry category.

Paper I-94s (white card stapled in passport, mostly pre-2013): Handwritten or stamped on the front. "A#" or "Alien Reg. No.

Naturalization Certificate (Form N-550 or N-570)

Top right corner. In practice, "USCIS Registration No. " or "A-Number". Same number you had as a green card holder. Naturalization doesn't change it — though you stop using it for most things once you're a citizen.

Immigration Court Documents (EOIR)

If you've been in removal proceedings:

• Notice to Appear (NTA): Top right, "Alien Registration Number"
• Hearing notices: Same spot
• Judge's orders: Same spot
• Board of Immigration Appeals (BIA) decisions: Top of first page

This number follows you between USCIS and EOIR. It's the same file.

USCIS Biometrics Appointment Notice (Form I-797C)

Top right corner. "Alien Registration Number". If you've filed anything that requires biometrics (I-485, I-90, I-751, N-400, I-131, I-765), this notice will have it.

Form I-130 Approval Notice (Where You're the Beneficiary)

If someone petitioned for you (spouse, parent, employer), the I-797 approval notice for that* petition shows your A-Number — not the petitioner's. Top right.

Form I-140 Approval Notice (Employment-Based)

Same deal. Your A-Number, top right.

Freedom of Information Act (FOIA) Response

If you've ever requested your own file from USCIS, ICE, or CBP, every page of the response will have your A-Number in the header or footer. It's the most reliable place if you

can't find it elsewhere.

Digital Records and Online Accounts

USCIS online account: Your A-Number appears prominently when logged in. No screenshot needed — it's right there in your profile.

MyUSCIS mobile app: Same deal. Sign in and your number is visible immediately.

Email correspondence: Search your inbox for "USCIS" and "receipt" or "approval." Most official communications include your A-Number in the footer or body text.

What If You Still Can't Find It?

Don't panic. Contact USCIS directly with your full name, date of birth, and case details. They can verify your number or provide documentation.

For recent filings, check your mail carefully — sometimes documents arrive separately or get misfiled.

Consider requesting a replacement I-797C if the original is lost. USCIS can issue a duplicate, which will contain your A-Number.

Why Your A-Number Matters

Your A-Number is more than paperwork — it's your immigration identity. That said, it links every interaction with USCIS, CBP, and immigration courts. Lose it, and you lose continuity.

Keep it secure but accessible. Store digital copies in cloud storage. Maintain physical backups in waterproof containers.

Final Thoughts

Finding your A-Number across multiple documents can feel like detective work, but each piece tells part of your story. S. Day to day, whether it's on a green card, naturalization certificate, or court notice, these numbers connect your past, present, and future in the U. immigration system.

Know where to look, screenshot what you find, and organize everything systematically. Your A-Number isn't just a number — it's your key to navigating the complex world of U.S. immigration.

Stay organized, stay informed, and remember: every document you collect brings you one step closer to securing your American dream.