He called me as well twice, i m in the middle east and he tried but his bad luck that whenever he calls, i m in bed sleeping...:)

This number seems to be associated to the same guy using 623-792-8150 and 626-444-5555, calling usually between 2am to 6am Central.  He usually says "Hey, how ya doing" and when told he has the wrong # he says "No I don't" and sometimes presses numbers on the keypad.  I did find out that if your phone has the ring id feature you can block the # by saving it to your phone, not the SIM card and set the ring Id feature to use the silent ring tone.