The phone rang, but I was busy at the time, so I pressed the button to send the call straight to voice mail.  The robo-caller must have started talking before the voice mail started recording, because in the end all I got was, "…call list, press 2 now." and that was it.

When I press 5, my voice mail tells me call's the date and time and caller's number or name, so I tried that.  The name sounded like "mykformiter".