The visa number is a red number that is generally printed on the bottom right side of newer visa documents. In most cases, the U.S. visa number contains eight numeric characters. In some cases, the number contains one letter followed by seven numeric characters. The number is temporary if you have a nonimmigrant visa (such as a B-2 visitor or F-1 student visa). The visa number is permanent for immigrant visas (green cards).
Over time, the U.S. Department of State has changed the location of the visa number. The examples below may help you find your number.