don't know who is calling but, they call sometime 4-6 times daily

Receive calls repeatedly.  When I call back there is always a "very fast" busy signal as though the phone is out of order.  They "never" leave a message.

a dozen automated calls today. they call daily when im working and never leave a msg. I get the same fast busy signal.It feels like a debt collector but if they have some debt or something owed by me I think they should let me know.

Has anyone answered when this number calls?  I have been getting 4 calls a day while I am at work and when I call back the message says it "your call did not go through, please try your call again"