Just read in the art blog DART that cell phone numbers go public in October. All cell phone numbers are being released to telemarketing companies, who can in turn add them to their RobotCall lists.
To prevent your number from being called, you can call the National Do Not Call Registry at the following number FROM YOUR CELL PHONE: 888-382-1222.
You must call from the cell phone you want to protect. Once your number has been on the registry for 31 days, most telemarketers will not call.
You can also register your number online RIGHT HERE.