I'm replying to my own post... I went through the eternal hold process after I called and found out is a subscription service company. Regarding subscription - mine happened to be for an industry publication.
Hopefully that will stop the annoying phone calls.
My experience was pretty much the same as the others listed here. I received more than five calls from this number in the span of two days. When I finally talked to them it I found out they were calling about a free magazine subscription for the industry I work in.
This number is calling from the Dallas, TX area of the united states. They are a call center and the software must be auto-dialing to sell magazines. Better than a door to door but really, the name on caller ID is always "Unknown" and there is such a long delay that we usually just hang up - if we ever even bother to answer at all. This is actually a negative incentive and a badly run business.