Who called from 8639044825

Got a call from this number.... they did not leave a message

I am only 15 years old! And a single white lady! I was in school when i got a call from this number! Thankfully it was on SILENT! But my teacher wouldn't have cared if it rang, she was too busy talking about her boyfriend.

Call came in from this number, I picked up, nobody / nothing there.

Called my cell phone at 6:25 PM.  No answer when I tried to call back.

somthing about the 2nd notice about my factory warnanty. Wanted me to call a number. I hung up. They call once every week or so. I don't have a warrenty on a vehicle.