Saw this on my caller ID. It said, "Joanna, SC." I don't know anyone who lives up that way. No good results here or on Google. I used *67 to block my number to call it back and got the "Please press 1 to be removed from our calling list." I pressed 1, and they apologized and asked for 48 hours to process my reqyest. If my number was blocked, they don't know whom to remove from their list, so it has to be a sham. They are now blocked from calling me.
It probably wasn't a real Greenville, SC number. Telemarketers can disguise their number. Unlike the "norm" today, which "requires" you to answer your phone, whether a land line or a cell phone, YOU'RE NOT REQUIRED TO ANSWER YOUR PHONE! If you don't know them, don't answer it.