annoying in that I get four or five a day... they never leave a message and hang up when I answer.

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.

They call 4-5 times a day. I want them to stop ASAP.

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.