An A Number USCIS is an alphanumeric code issued by U.S. Citizenship and Immigration Services to uniquely identify an applicant or a case. This identifier appears on all forms, notices, and records related to your immigration journey, helping officers track status, history, and decisions.
Understanding what an A Number means and where to locate it helps you manage your application, communicate clearly with agents, and avoid delays caused by mismatched information.
| Term | Also Known As | Where to Find It | Purpose |
|---|---|---|---|
| A Number (USCIS) | USCIS Number, Alien Registration Number | Form I-797, I-485, I-94, ID cards, correspondence | Track case, link records, verify identity |
| Receipt Number | TSCN, Case Number | Form I-797C, I-797, I-129 receipts | Monitor processing stage and office |
| Case Number | USCIS Case Number | I-797 approval notices, online account | Identify specific adjudication file |
| Green Card Number | Card Number | Front of permanent resident card | Proof of status, used for travel |
How to Locate Your A Number Correctly
On Form I-485 and I-797 Documents
On most USCIS forms and notices, your A Number appears in the top or bottom margin, often labeled as "USCIS Number" or "Alien Registration Number." On Form I-485, it is usually printed above your signature block and also shown on the approval notice I-797.
Inside Your MyUSCIS Account
After creating a profile, the dashboard lists each case with the associated A Number. You can click into the case to view details, history, and documents, ensuring you always reference the correct identifier.
Why the A Number Matters in Processing
Tracking Case Progress
USCIS officers use your A Number to pull up your complete file. When you check status online, call customer service, or attend an interview, providing this number speeds up assistance and reduces the chance of miscommunication.
Linking Records Across Systems
This identifier connects your application history across different benefit types, such as work permits, travel documents, and permanent residence. It also appears on employment authorization and green cards, keeping your records consistent over time.
Key Actions for Managing Your A Number
- Copy the exact A Number from official documents when communicating with USCIS.
- Store scans of forms and notices showing the A Number in a secure folder.
- Verify the number before submitting online forms or making phone calls.
- Update any third‑party representatives promptly if you change names or identifiers.
FAQ
Reader questions
Is the A Number the same as the receipt number on my form?
No, the A Number is a permanent identifier assigned to you, while the receipt number identifies a specific submission and changes with each new filing.
Can I use the A Number to check my case status online?
Yes, entering your A Number on the USCIS website allows you to view the current status and history of your case quickly.
What should I do if my A Number is not recognized online?
Double‑entry the number, check for extra spaces or hyphens, and if the issue persists, contact USCIS support with your full name and date of birth for verification.
Does the A Number change after I become a permanent resident?
No, your A Number remains the same even after you adjust status and receive a green card, linking pre‑ and post‑admission records together.