Who called from 4072875931

This number calls me and when answered no one is on the other line nor do they leave a voice mail.  When I call the number back it tells me that the call cannot be completed.

This number keeps calling my cell phone and when i try and dial it back it says it can't be completed.  how can I find out who this is

Same has happened to me

report the number to the www.donotcall.gov website after you register your phone in the registry.

report the number to the www.donotcall.gov website after you register your phone in the registry.