They're a collection company representing old apartment leases. They can be very rude and even hang up on you when they realize that you know your legal rights.What I don't get is that they call several people surrounding the person in question (mother's cell phone, roommate's mother's house phone, etc...) weeks before even calling you directly. I mean, they have your phone number to begin with, so why call people not involved in any way? How did they even get those numbers?!?! It definitely goes above and beyond a harassing level.