If you're a student at LoneStar College, your Student ID number is likely either your 9-digit Social Security Number or your 10-digit date of birth. You can find this number on most of your college documents, including your tuition bill and class schedule. If you don't have any of these handy, you can also call the LoneStar College Help Desk at 832-813-6600 and they can help you locate your Student ID number.