The scammer/whoever is calling based on #s from websites such as monster.com, but monster.com or other websites aren't selling them. Those guys are searching public domains (such as monster, personal websites, etc) for information, and that's how they got your number.
I got several "inquiries" for an item that i posted on facebook, wanting to know my name, address, bank account #, and phone # so that he could send me a check for the item. Needless to say he's phishing for my information. Don't start blaming/posting personal information, such as Lillian's information unless you really know what's going on.