Who called from 4159917604

Phoned at 7:55 PM.  No message left.
800notes has lots of posts regarding a very similar number (415-991-7603) which also started recently.  (Oct 15)
My suspicion is both numbers are being used by the same party.  Probably a scam.  I don't answer unrecognized numbers.

Received an unidentified call from this number at 4:57 p.m.  with no message left.  Only friends have my cell number so I thought it was suspicious.  I have blocked this number going forward.

call and no message. just hung up. blocked call

Received call from this number, when answered they hung up.  Blocking number

Call and no message - blocking the number