I just received a call from this number (2033880774) and it was about a job fair. At the end of a call, the person who called asked my cell number and its service provider. It's really annoying that I didn't provide additional information.
i received a call from 203-388-0774 and caller keeps hanging up. i think you are right about it being a telemarketer but i have subscribed to do not call list which included my cell phone. there has to be a law against this...