They call repeatedly but do not leave messages. If you call the number back, you get a recorded message that says “call our corporate offices at 866-320-4607”. At that number, you get another recorded message that says “you have reached ‘Centivate’, a marketing research company.” They also provide you a prompt to add your number to their Do Not Call list(I’ll see if it works). I did buy a Toyota Camry in Northern VA this week… not sure if it is connected, but based on other posted comments, seems likely.