This number keeps calling our work, when we answer they hang up.  If we let it go to VM they never leave a message.

this number called me three times today and hangs up when i answer.

A woman at this number called and asked to speak with Barbara.  I told her Barbara does not live here and did not Barbara give her a number to call.  She replied that this was the number Barbara gave her.
I dialed *69 and was given the above number as having called my home. I asked who she was and she said ARS.

ARS called my home phone and asked for Barbara.  Barbara does not live here.

"Kristin" from this number keeps calling and asking for someone we don't know.  We continue to inform her that we don't know anyone by the name she is asking for, and she keeps telling us this is the number on file that was given by the person she is calling for.  The caller says she is with "ARS" and is trying to update a file, but that is the only information we can get out of her.  She won't identify the company in any other way, so I have to assume this is a debt collection agency.