1. On the Xbox Dashboard, choose the Settings tab.
  2. On the Settings screen, select Network Settings.
  3. Select the Wired Network.
  4. Choose Configure Network.
  5. Under Basic Settings, check to make sure IP Settings is on Automatic.
  6. Go right to select the Additional Settings Tab.
  7. Go down and select the second item Advanced Settings.
  8. Toward the bottom of the screen you should see Wired MAC Address. The MAC Address is the number below this.