在填写DS-160表格还有其他表格文件的时候很多朋友也遇到了关于visa number是什么的疑问，签证上那么多的数字到底哪一个是visa number呢？
这里给大家作出解释：
visa number就是签证上面的那一串红色的数字。
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以下是来自移民局的解释：

The visa number can be found on the Visa sticker on your passport page. The number can be 8 or more characters long, and in RED color, located towards the bottom right hand quarter of the Visa sticker. Be advised that the "Control Number" is not the Visa number.

If you mean a non-immigrant visa such as a B1, B2, F1, H1B, then it's on the visa itself. The visa would be the nice-looking laminated sticker (the new ones, at least) on your passport, and the number would be a long number on the top of the visa. If you lost it, there's going to be some minor problems obtaining the number, but you would have to contac the Dept. of State or the consular section where you obtained the visa. If you're talking about an immigrant visa, an A-number may or may not be assigned to you if you're still waiting for the petition to be approved. Generally, this would not be termed a "visa number". Check out any I-797 Notice of Action mailed by USCIS. The 9 digit number (sometimes 8 digits since the first number is assumed to be 0) would be above the beneficiary name (A *** *** ***). If the number's not there, then there's none assigned. Depending on why you need the "visa number", you can use the receipt number as proof that there's a pending petition (the receipt number is 13 characters long and starts with three letters like EAC, WAC, or MSC). For Non-Immigrant Visa, Visa number is the RED Number on the Visa itself. This answer is from USCIS.
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