Does anyone if your IP address changes if you change to a different router or is that totaly based on a the ISP. How does you IP address change?? Like for example if im using mY MBP connected to my wirless linksys router on my pc. Is my ip address the same as my PC on my MBP or is it different. If i were to get the airport extreme does my Ip address. Im sorry for these noob questions but its something I need to know thanks again.