I keep getting calls from this number and others of 724-510-xxxx.  They do not leave a message but when I call back they never identify themselves.  I get someone that says, "Hi, my name is (blank), how can I help you?"  I have asked for the company name but they always want my information first.  I am not comfortable giving them anything until I know who they are.  The numbers track to VOIP in New Castle, PA.