I received several calls on my work number with no message left and they wouldn't answer when I picked up the phone (dead silence). I finally got tired of the hang ups and called them back and they picked up but they wouldn't tell me who they were trying to reach. Very combative attitude on the phone - the woman that answered wanted to know my name and the number I was calling from. I said that you should know - you just tried calling me. She wouldn't tell me who they were trying to reach - said it was confidential. Basically, I think they are just cold-calling people.