I got a call from 312-273-9104.a few times. I think you have to register your number annually with the donotcall registry. then go to the registry and file a complaint.
if you have an android phone go to the android market and get the app Call Block. its easy to set up and add that number to the "black list". you will never get another call from them again!!
Got another call from this number, it's a cruise scan, they want you to take a survey and you will be "eligible" for a 2-day cruise. Just left the message running and rerunning over and over until it hung up, run up their toll free bot lines. I am reporting it also to the DoNotCall list as I am on that list.