I think it's a debt collector. They called mine too but wouldn't state who or the reason why they were calling. Just that I needed to call back immediately.
I just received a call from this number about 2 mins ago. I answered and there was no one there. Just called the number back and then I talked to a operator and then she connected me with another person. Started talking to this second person I kept asking who was this and he kept avoiding the question. Then he asked me the number I did not tell him the number you could hear people talking in the back ground he said he was trying to find my number there was over 300 compaines connected with this number I told him to take my number off of their call list or I would report the number! I think it was a bill collector! Screw it!