caller id says: MI, USA
calls about twice a day; uses other numbers too same area code & prefix
1(313)373-1057
-1273
-2219
-1512
-2399
-2045
-1879
-1861
-1455
-1772
-2608
-2043
-1286
-2385
-1404
-1726
...started receiving calls since june 14, 2013...& continues...
never leaves a message.