If i don't recognize the number i don't answer. Since i've been getting these calls more and more often, i just reject them. If it's someone I know, they'll find a way to contact me.
WCA Offer Clearinghouse? Not only did they call my cell number from this number, they also called my cell number two days ago from a different number (314-627-6741). I called that other number to remove my cell number (which is on the Do Not Call list).