Who called from 8474254632

Call from 847-425-4632.  No business name.  They rang twice and hung up.

Got a call from this number - said it was the wrong number.

It was a woman saying "Is this something (unaudible) company" I said no.  She said I have the wrong number and hung up.

Just got a call from this number and let it ring (I am at work). No message was left.

This number called my firm this morning and has been not worked for return call.  It ran about three times and when I picked it up the other party hung up on me after I said "Hello, VAT"

Rude or mistake???