This number shows up and when you answer they hang up.  When you call back the hang up the phone???

This number called me and asked me to not sign up with any magazines since I already have a subscription with them.  I told them that I do not have any magazine subscriptions and they said that I did.  When I asked them which one, they said they didn't know.  As soon as I said "this is a scam" they hung up.

call and hang up