The following instructions tell you how to find your IP address under Windows XP. These instructions will also help you find your MAC (hardware) address, DHCP server, DNS server and other useful information. They might help you troubleshoot a bad ResNet connection too. If you have Windows Vista, use these instructions instead.

 Go to the start menu and select Run…. Then type cmd in the box and click OK.

                                  

 At the C:> prompt type ipconfig . Then press Enter. Your IP address, subnet mask and default gateway will be returned to you. If your IP address is 192.168.x.x, 10.x.x.x, or 172.16.x.x, then you are receiving an internal IP address from a router or other device. The IP address that the world sees is that of the router. If you are receiving a 169.254.x.x address, this is a Windows address that generally means your network connection is not working properly.

 If you want more detailed information about your network connection, type ipconfig /all at the prompt. Here you can get the same information as ipconfig with the addition of your MAC (hardware) address, DNS and DHCP server addresses, IP lease information, etc. If your IP address is 192.168.x.x, 10.x.x.x, or 172.16.x.x, then you are receiving an internal IP address from a router or other device. The IP address that the world sees is that of the router. If you are receiving a 169.254.x.x address, this is a Windows address that generally means your network connection is not working properly.

ipconfig /release at the prompt and press enter. Then type ipconfig /renew and press enter again. If your connection is okay, a valid IP address, subnet mask and default gateway will be returned to you after a few seconds.