Got a call from this number for some kind of healthcare product. I think this might be a wardialer looking for valid modem numbers, or some of type of enumeration approach, because when I attempted to speak to a person I only got a short period of silence and then some clicking noises. That would explain why they do not respect the Do Not Call List, and would explain why healthcare products are being sold out of a hotel, with no one on the other end of the phone. It's a simple way of illiciting a response from a 'live' number, as opposed to a machine, and either using the machines in a further attack, or selling the 'live' numbers to third parties with actual products. Just my thoughts.