Received an email from the following person in response to my email earlier today.  You may wish to contact him directly.  Indicate the phone number that is being called, e.g. your phone number.

Robert Martinez

Fraud Investigations
Level 3 Communications

   Phone: 800.348.5457
   Direct: 512.742.4554
   Fax: 800.353.9495
   1122 Capital of Texas Highway South
   Austin, TX 78746-6426
robert.martinez@level3.com

I get this call 3 or 4 times a week around 10pm.  When I tried returning the call I get a message that your call cannot be completed at this time.  When I answer, nothing happens for a few seconds and it disconnects.  What can we do to stop this aside from changing our number?

I keep getting this call at night waking me up.  If it doesn't stop I am reporting it to the telephone company. I had this problem one time and the FBI took care of it. SO KEEP CALLING JERK!!

Call with no one on the line when answered.

I too recieved this call just now.