Not quite a system to see only UC number. It’s when you submit your application, they will give you an applicant number. You don’t send transcripts until after admitted, so they will never know your name. Your information will be provided through your CA identification number if you are in-state. Your parent’s names are not asked for, and your social security number doesn’t reveal your race. They do this so readers (typically teachers and alumni) are not given any reason for bias when they rate your application on a scale from 1 to 5.