This robo call automated message gives you (855) 841-6089 number to call for supposed prize money.  This number comes from Chicago area.

left message stating he had great news about the $25,000 sweepstakes I had entered sometime in the last year. Told me to call toll-free 855-891-6089 so they could verify my entry. Problem is I have not entered any sweepstakes. So didn't call back. Caller ID states "National Service".