Instructions
Make sure your wireless network is turned on and connected to the Internet.
Connect your wireless adapter to your Xbox 360 if necessary, and turn on your Xbox 360 console.
Navigate up or down on your console's home screen to the section called "My Xbox." In this section, scroll across to the panel called "System Settings," and press "A" to select it.
Scroll down to the "Network Settings" option and select it with the "A" button.
Consult the bottom of this screen to see your Xbox 360's wireless connection status information, such as whether it is connected to the network and connected to the Internet.
Select "Configure Network" on this screen to view your console's IP address. You might need this to identify your Xbox 360 on your wireless home network.