I also received a call from this number and I answered it thinking it might be someone important and they immediately hung up.  I tried to call it back and all I got was "the person at extension 5 is on another call"  No mention of a company or anything.  Interesting.  So tired of these type of phone calls.  I have filed complaints with the FCC and registered my number with the "DO NOT CALL" list.  It does not seem to help.  Why can't we stop these calls.