Who called from 5083294138

Phoned at 4:52 p.m. on 8/8/07 and again at 4:54 p.m.  Nothing is said except from me of course saying hello, hello, can I help you?, hello??? and getting no response.  This is aggravating, especially when they phone back 2 minutes later. It seems I am getting more and more of these types of calls from out-of-state. (I'm in Illinois.)

received call today.  Seemed as though nobody was on the other line, just static.  I'm in North Dakota.

Received call in afternoon,  No one on the other end would say anything.

received calls from this number; i was on the other line but was expecting another phone call so i called back and just got a quick busy signal.

have been receiving calls from this number for about a month. never leaves a message and nothing on the line when i answer. i'm in oklahoma.