Got a call from this number 3 times within one hour.

i answered the phone and it was silent i kept saying hello but no answer and then they hung up.
I could hear them doing something in the background.

Its 'National Hearing Care' - just called them after they called and simply hung up, i have now added their number to my PBX's 'block list'

Have received numerous calls from this number.  We answer and they hang up.

Call from (07) 3018 1190 on 7th Feb 2011 11:41amI answered with my business name and No one spoke from the caller end, I heard people speaking in the background, so I hanged up.

These guys are researching when you are and aren't home.They sell the results to telemarketers who then save themselves time and money by only calling where the research shows you are likely to answer!And yup .... I've got a silent number!The only thing that works against them is caller i.d.

This number belongs to National Hearing Centres

Call from (07) 3018 1190 on 7th Feb 2011 11:41am
I answered with my business name and No one spoke from the caller end, I heard people speaking in the background, so I hanged up.

wonder if their hearing was working when i had had enough and told them to f... off... 6 calls? 7 calls 1 day and more then that the next? these guys need to pull up a bit i think...