Caller ID indicated Unknown Caller.  There is a voice mail left in which the address me by my surname, but they don't leave any information about why they are calling..  Have called several times in the last couple of days.

this call went to voice mail and the caller used a friendly tone to greet me using my surname as well. Then hung up. sound fishy to me

They call every day and never say anything. I called the number back, no identifying verbiage just a machine telling you to leave a message. I blocked the number, must be a scam since they don't want to be identified.