-- Posted by Dannay at 5:24 am on Oct. 23, 2008 This may seem like an eggie question but i found that when i turn my router off at night then turn it on in the morning i notice that the the IP address has changed so jw would anyone know say if i turned it off now how long i would have to wait to turn it back on to find that it has given me a new ip? -- Posted by JustWannaReadStuff at 5:30 am on Oct. 23, 2008 You have a dynamic IP, and every time you turn your router off and then on, it refreshes your IP address. Doesn't matter about the time. It's instant. -- Posted by marshmellowman at 5:35 am on Oct. 23, 2008 So you mean your local IP address (ie in the 10. or 192.168. subnet) or your WAN  address (which identifies you on the Internet). Most likely you have DHCP enabled locally which distributes the IPs automatically when the computers connect, so if you restart it then another computer on the network may get your address. If you'd like the same address you should be able to turn on IP/MAC assignments so they get reserved ones, whilst still allowing DHCP on your router. If you mean your IP address that identifies you on the Internet, well your ISP gives that out to you, and a new one is given whenever you reconnect to the Internet with your modem, so it would make sense that if you restart your router (assuming modem/router are the same device) then a new IP address is assigned to you.