Got a call from such strange numbers again.  Wondering if it could be some syndicate scam who will pluck our numbers from the internet.

From my research, I came across this page where many people have also received a call from such a number; and the person calling is PRC native who claims some kind of "prize scam" which has been getting very common lately:

whocallsme.com/Phone-Number.aspx/99001
 
I decided to ignore the call.