What is the alien registration number of immigrant visa?

The alien registration number of the immigrant visa, the "A" number, is the alien registration number, that is, the green card number. It used to be called "INS A #".

When the applicant applies for immigration or immigration visa holders to enter the United States, an "A" number equivalent to the ID number will be assigned to the applicant. Generally speaking, after the first application is submitted, there will be an A# on the receipt. Please fill in this number if you submit any application in the future.