This turned out to be a Biz Opp marketing company. The guy was pushy when I asked him to remove my phone number from their list.
I am on several such lists because I gave my phone number to a famous Internet Marketer.
My advice: Don't ever give those guys your phone number because now they are using call centers and high pressure tactics - kinda of like car salesmen...there's a hint there as to who the Internet Marketer was.
I don't know of any cell or voip service that doesn't allow you to just block unwanted callers. I checked up on this number here in the thread, and blocked em'. Pretty simple.
They keep calling my home phone (also on the DNC list), and when I answer, you can tell the line is open, but no one ever says anything. I reported the number to the DNC registry; didn't have the name of the company.