Who called from 2012052515

Got a call from this number and have no clue who it is.  Not going to call back.

I just got call from this number.  I did not pick up as i don't recognize #

Did not answer this number as it is unrecognized.

This is a telemarketer, I answered and it said press 1 to talk to someone, when that someone came on I hung up. He called me back from his real number 312-288-0314. Call and tell this artard you're not interested.

I usually get 2-3 calls every week from WCA and most of the time its from the new number. Does anyone know how to stop these spam calls.