Caller ID said "di silvestro ro", call was a recorded message offering a resort vacation, we hung up.  Internet search showed that the number is a fax number belonging to Robert Di Silvestro Chicago Lawyer, Attorney; probably spoofed caller id.

With calls like this, it's hard to know if it is someone looking for credit card information or someone who actually gives a free vacation so that they know when your home is empty.  Be careful everyone, scammers are very creative these days.