I have been getting calls for the past couple of weeks at all times of the day and night from this number.  Very Harassing!!

That is a general number for the University Of Michigan..any call from campus offices or phones are blocked with the switchboard number. Its part of university policy to protect their private lines.

Seemed OK to me.  Some student calling for work on his research.  He gave me a call back number that was different than the caller id.