It's from a "private" investigation service in Illinois.
Often associated with debt collection.


http://dawhois.com/www/arkus-investigations.com.html

Sales call from air-duct cleaning

Air duct cleaning

I am tired of these teleamarketers calling-especialy around the time the social security money arrives. I do not answer any callers unknown to me.....

Received call at 1:25 on week day.  When I asked for name of company - very young sounding girl said something that was almost intelligible -- sounded like Illinois Air Cleaners?   When I asked where she was located, she rudely hung up on me!!!