It's cingular wireless. That is just there phone service. It is a collection agency in Newark, NJ. They handle mostly medical bills that you owe. If you block them they use other numbers they call from. This number makes 3 that I blocked from them.
I get the calls from this number at least once a week. if I don't answer, they don't leave a message. If I do, they ask me to verify the address and provide me with my address from 12 years ago. Then they tell me they have some notice for me..