Get a whistle and blow into the phone if they're persistent...that should take care of the 'problem' calls like this. I'm threatening to go buy a whistle just for that purpose, but usually do not pick up on such calls.
This number 203-433-2600 (which just called my cell phone a few minutes ago) belongs to
YALE UNIVERSITY SCHOOL OF ART
http://www.computerartstncc.com/brgriffith/art264/yaleartschool/about.html