This is a criminal extortion ring operating out of India. ABC News released an investigative report on it in June. The FTC has indicted one of its ringleaders for criminal fraud:
Lalo, you are 100% correct. I work for a university and we have been receiving phone calls from multiple numbers listed above from heavy accent easterners who aer very abusive and abrasive. The people they are asking for no longer work for our company and they tell us we are lying. When we ask to speak to a manager, they yell back that we are in no position within our company to request such information from them. I'm checking with our legal department for ways to end the calls but we can't even know what number of huindreds that come to our main switchboard these people are calling. This jackbag took it too far today when he had his auto dialer set with our number programmed in and was blowing up our lines and just playing music. He will efectively force you to shut down you phones. This is nightmare for a corporation as big as the one one work for. BEWARE!!!