got a missed call from this number.. If it's Hult Business School, they could have obtained your information if you signed up for the GMAT website: mba.com
I think once you sign up with MBA.com your information is shared with other schools that will try to recruit you... I actually decided to go with Keller Graduate School of Management so am hoping these other schools will stop calling!
I have received 3 calls from this number. I too, receive emails from Hult Business School, but I do not know how they got my number. I have answered the call once before but nobody responded. The number just hung up. Weird.