Just the name of the assistant in the CEO's office can be valuable. Private investigators and even head-hunters do this all the time. They'll call the switchboard operator and say they want to be connected to the CEO's office. When the secretary or executive assistant answers, they'll say they have a document or package for the CEO, or if they send an email attachment, would she print it out? Or else they'll ask, what's the fax number? And by the way, what's your name?