How to find your MAC and IP Addresses

Wired and Wireless MAC addresses each have a unique set of characters. You must be sure you have selected the right set when registering your computer, or you will have to re-register with the correct MAC address.
Contact the Information Commons at extension 5-Help while you are viewing your computer's information if you are not sure which is the correct MAC address.

FOR INSTRUCTIONS, PLEASE SELECT YOUR OPERATING SYSTEM:

Windows XP/2000 | Windows 98 | Macintosh OS X | Macintosh OS 9

WINDOWS XP/2000

1	Click the Start Button and choose the Run command from the Start menu.
2	Type cmd in the blank box. Click OK.
3	In the MS DOS windows, type ipconfig /all.
4	Write down the Wired and/or Wireless Physical Address (see image below).
	Look at the information under "Ethernet Adapter Local Area Connection" to register for a Wired Connection. Look at the information under "Ethernet Adapter Wireless Network Connection" to register for a Wireless Connection.

WINDOWS 98
1	Click the Start Button and choose the Run command from the Start menu.
2	Type winipcfg in the blank box. Click OK.
3	Locate your Ethernet adapter information by clicking on the drop down arrow at the right of the first field and selecting the brand of your Ethernet card (NOT PPP).
4	The box labeled "Adapter Address" IS YOUR MAC ADDRESS. Any IP address currently assigned to your computer will be in the field below.

MACINTOSH OS X
	Please note: Wired and Wireless MAC addresses are different. Look under Ethernet ID for a Wired Connection. Look under Airport ID for a Wireless Connection.
1	From the Apple menu, choose System Preferences > Network.
2	Choose Built-in Ethernet on the Show pop-up menu, then the right most tab called Ethernet.
3	Write down the Ethernet ID; this is your wired MAC address (also known as physical address).
4	From the "Show" pull-down menu, choose AirPort.
5	Write down the AirPort ID; this is your wireless MAC address.

MACINTOSH OS 9
1	Click on the Apple Menu and select Control Panels and TCP/IP.
2	Select Connect Via: Ethernet.
3	Select Configure: Manually.
4	Click the Info button or choose Get Info from the File menu.
5	The "Hardware Address" IS THE MAC ADDRESS, "This Macintosh" IS THE IP ADDRESS