Who called from 4144550047

I have received three calls from this number.  There is no voice mail left and when I attempt to return the call, it says the number is not a valid phone number. It is obviously a spoofed number but I have no idea how to report it.

Called my AT&T cell phone at exactly 12PM. Did not pick up, did not leave a message.

Called my AT&T cell phone at exactly 12PM. Did not pick up, did not leave a message.

Just called me. Did not pick up. Left no message.

Received a call at 12:00 p.m. CST - did not answer and no voicemail was left.