I also have received two calls in the last two days from this number, one at 7AM and one at 11:54 PM. Today I filed a complaint with the FCC and I urge anyone who ahas received harassing calls from this or any other number to file such a complaint. It does little good to complain about it on forums, but if enough complaints are filed with the FCC, we have a better chance of stopping them. The link is:
http://www.fcc.gov/complaints
I selected "Abandoned Calls' ('Silent Calls,' 'Dead Air Calls' from a telemarketer) and 'War Dialing' received on your residential or business telephone" since nobody answered on either call.
Multiple calls between 2 and 5am on personal cell and university numbers (voice over IP, Microsoft lync). No answer, on calling back number said it was not in service. Filed complaint with FCC.