Received a call didn't answere left no message.

This is a robo caller for carpet cleaning that has a Caller ID of Bullhead City, AZ. Must be a scam given the distance from our home and this is the same caller that changes phone numbers each time we block them

Got a call from this number today (8/29/2015) at around 2 PM Mountain Time.  Caller ID was "UNKNOWN 1-928-299-5063".  Let it roll thru to voice mail.  There was a delay of several seconds before the robocall left a message, which was more or less as follows: "Hello.  Are your carpets dirty?  This is Clay with the Carpet, Tile, and Furniture Cleaning Experts, and for a limited time ..." yada, yada, yada.  The message rambled on for over a minute, then finished up with this:  "To schedule an appointment, please call 702-327-3510."  I've added both numbers now to my Call Block List.