This number has called my mobile phone the last three days in a row. Never leaves a message and no caller ID except the phone #. I'll give that # a couple more days and then I will block if they continue.
Most survey calls are exempt from pre-screeening against the Do Not Call list. However, if the survey leads to a sales attempt, a request to have a salesperson call you, an invitation to attend a sales presentation, or an request to have someone stop by to give you an estimate, then the DNC rules apply.