Calls on average about once or twice a week for several months, always during normal hours. Never leaves a message and hangs up when I pick up.
When I call back it rings but instead of a voicemail I get a dial up signal. I thought it might be a fax but I can hear someone on the other end when I do pick up and sometimes they pick up and hang up on me.
Landline (I get a busy signal sometimes).
Area code is for Greensboro, NC