I work for a major hospital as an admin in the IT department.  I get tons of calls from companies like this.  The person who called had a heavy accent and the connection was bad.  She asked for someone who no longer worked there, then asked for three people in other departments, then tried to get me to connect her with our IT manager.  When I asked her for HER information, she backpeddled and said she would call back later.  I have learned to keep a running log of all calls.  I just look at the caller ID and don't answer if the number is on my "persistant vendor / spam" log.