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Immigration Resources
What is Alien Registration (A-Number), and Where Can You Find It?

The Complete 2025 Guide to Understanding and Locating Your A-Number

An Alien Registration Number, or A-Number, is a unique identifier assigned to non-U.S. citizens residing in the United States. This comprehensive guide explains its importance in immigration procedures and provides step-by-step instructions on where to find your A-Number across various official documents.

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By Michal
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