it is highly unlikely that anyone can find out anything about anyone by knowing their IP addreses at any given time.
usually the only things you can find out are the name of the ISP and maybe the name of the city/town where they are located.
here is the current information of my static IP address:
the city is close but at least 30 miles away from where I live.
people should really stop believing all the crap they tell you on tv about how they can find you using a IP address.