This number called our home number which is not unlisted.  Asked for my husband on an automated system.  I waited on hold just out of curiosity.  A woman came on the line and asked if I was my husband.  I replied no and who was this calling.  She would not give me her name nor would she give me the company she was calling for.  She repeatedly asked me for my husbands last 4 of his social for her to tell me who she was or who she was calling with.  I refused of course.  She persisted.  I again and again refused to give it to her and ended the conversation.