Received a call from this number, rang once then hung up. The reason they hang up is that their trying to get you to call back, at which point they will claim that you attempted to contact them first thus circumventing the do not call laws. Don't fall for it.....
Sorry but you are doing nothing but perpetuating a myth; that calling them back circumvents the DNC. But since you are so knowledgeable please cite you sources to prove your statement.