Received 2 phone calls solicting for free tutoring

Just called my cellphone but I didn't answer because it wasn't a familiar number...annoying

6265445690 keeps calling my home number then hanging up. Caller ID says from free tutoring. Never says anything but continues calling. Very annoying and when I call back it says the number is not in service. I really wish some agency would crack all these falsify calls from people that apparently don't mean any good.

I keep getting calls from this number, ID says it's free tutoring, when I press yes for more info, I ask the girl how they got my number and she hangs up everytime! Seems fishy.

This number was calling about once a month since June now I'm getting 1-2 calls a day at my small business number. I use AT&T

Please advise on how to remove my company from these lists.