My cell phone is on the Do Not Call Registry. This phone number actually left me an automated voice mail.
It said "I'm going to show you exactly how to start putting 10,000 dollars or more into your pocket every 10-14 days, and then 10,000 dollars more into your pocket every 10-14 days (this was repeated) this message will absolutely blow your mind, I guarantee you have never seen anything like this up until now, press 1 if you want to hear the details and press 9 if you never want to hear from me again."
Of course, I just hung up.
Just got a call from them on my iPhone. Answered, then they hung up on me. Doing a number search found that the number is located in Detroit, and is a VOIP type of phone (Carrier: Bandwidth.com)