Woman Chases a Man Down the Road

I turned my car into the road that leads to the main road. In front of me a number plate comes into focus- 6363. That had a familiar ring to it. I check the car- a grey colour wagonr. But off course, this was our classmate JS. I honked repeatedly to catch his attention and waved with my hands out of the window hoping that he would see his rear view mirror. No luck. He turned right into the main road and so did I. I chased his car till the intersection. Good Luck! It was a red signal. Oh No! He was taking a U-turn and I was to take the right turn. No problem. I will follow suit. Let me chase him down. I could always take another left turn and be back on track towards home. I followed his car still honking and waving and tried calling my husband to get JS on the line and tell him I am following his car (I didn't have JS' number). But before my husband could pick up the phone, we reached the red light and I drew my car next to his. The windows were tinted and I couldn't see a thing. I inched along and looked through the front windshield. To my shock it was someone else. Meanwhile husband picked up the phone.
What is JS' car number?
6336, why?
No, I just thought I saw his car, bye!