Long story short, my cell number is not listed anywhere, yet I got a call from Dept of Motor Vehicles, at first I thought it was some scam? They saw that I cancelled my insurance on my truck. Explained to the Lady that my clutch went out on my truck, and I'm parking it for the Winter, and If I don't keep it registered, I get penalized when I go to re-registered it. She was very nice about it, and said she will send me a form in the mail to fill out. Not sure how they got my (cell) number? No one but a few people like friends, family, and trusted businesses have it. If someone outside that group asks for a number, I give them my landline number, which has been disconnected for quite some time now.