Who called from 7206067104

Received early morning calls, sounds like a fax machine at other end.
when I called the number back, I got a message that to leave my number if I did not want
to receive unwanted sex calls and be put on a do not call list.
My phone has not been working properly since the last call.

Called cellphone at 6am it was a fax machine, they have numerous numbers they use. Very annoying!