I got a call from CDS (Communication Data Services).
I found that "it is an international data management company that provides services to publishers and direct marketers of all sizes, managing in excess of 150 million names of active subscribers for more than 400 magazine and product fulfillment clients in the direct-to-consumer and business-to-business markets".
Persistent callers who never leave a message. I normally do not answer these type knowing they are wanting something. One time I did, they wanted to do a survey and I said no....then hung up.