Who called from 4234905694

I got a call as well like everyone else, except they call between 6 and 6:10 pm every day.

Got a call on Sunday 7/15/07 from 423-490-5694.  Answering Machine picked up but no message was left. !!1  I am on the do not call list.  Is there anything I can do to keep them from calling ?

Rec'd call at 8:00 pm. Heard background noise and then a very careful hang-up. Very annoying!

(423) 490-5694 calls:
(1)07/15/2007 at 7:42 PM.  Left no message.
(2)07/16/2007 at 7:21 PM.  Left no message.
(3)07/17/2007 at 8:17 PM.  I pick up phone.  I told them to "stop calling my number."  There was no one on the other end.

Got a call 7/19/07 around 8:45PM.  Short call, nothing there.  I Called 423-490-5690; message machine said they were a survey company.