I just received a call from this # and it says "Wireless Caller." The call hung up after 4 rings, presumably to avoid my answering machine. I have no idea who it is.
I received this call regarding compiling credit card debt. I punched 0 twice and got a man. When I told him that I was an unlisted number, he said rudely, "why did you follow our prompts then." Tried to call this number to complain and found it was a fake caller ID number.