Got three calls in a row just now from number displaying at 408-880-6016. Connection was bad and a man with a broad, Southern accent kept saying "hello" and "how are you today." I repeatedly asked for him to stop calling. After third call, I just immediately hung up.

Did a reverse phone lookup at the website below. It says this number is a wireless mobile phone. (Gee, what a surprise.)

http://www.whitepages.com/phone/1-408-880-6016