Received a call on my mobile phone from 347-043-6764 on 5/30/2016 at 6:29pm EDT. Caller ID displayed "Unavailable". Did not answer and no message was left.
Based on the comments posted it appears that this is another number being used by the various "Tech Support" scams. I have added this number to my Google Voice block list. If the caller attempts to call again they will receive the not-in-service recording.