Who called from 5032018937

called at 1:22 3PM 12/29/2011 on my cell, located in Winston-Salem NC.  Several return call attempts produced busy signal.

Got call on my new cell from this number..... didnt answer.... no message left.

Got a call around 5:00pm, no one on other line.  I live in the Detroit area

This caller called a new phone number I have from Text Free 5:11pm in central Michigan

same as above. can't someone
shut down these annoying calls?
maybe it's a computer calling to add
$$ to people's phone bills ?