Apr 2, 2016
...the callers are scammers or spammers using a war dialer to dial everyone up.
You have to jump through hoops to be able to BUY the DNC list, including paying thousands of dollars, verifying that you are actually a business, registered to do business in the US, and give lots of information about your company such as the names and addresses of your officers, etc....
In either case, no one should do business with them anyway.