I have sprint, not sure if my carrier matters or not, I don't usually answer telephone calls when I don't recognize the number but this number called me like 5 times today, maybe my phone number was stuck in a loop to redial or not, finally answer the call and there was a slight hesitation and then they hung up so I called it back and of course there's no service at this number.
Do not answer! Called the # on my office phone and the number is a "non working number". Wish there was a way of pushing a button and tossing a digital hand grenade back at them.