IT Connect

Information technology tools and resources at the UW

Determining your MAC address

On a computer network, a media access control (MAC) address is your computer’s unique identification number used by the network to identify your device. The following methods will help you determine what your MAC address is depending on the operating system you are running.

Windows

  1. Click to open the Start menu
  2. Select “Run” if available, or click into the search box on the start menu itself
  3. Type “cmd” into the dialog box that appears, and click “Okay”
  4. Within the command prompt, type “ipconfig/all”
    C:\>ipconfig/all
  5. The command will return information that looks like the following:
    Ethernet adapter Local Area Connection:
    Description . . . . . . . . : 3Com 3C90x Ethernet Adapter
    Physical Address. . . . . . : 00-C0-4F-72-DC-2C
    DHCP Enabled. . . . . . . . : No
    IP Address. . . . . . . . . : 192.168.2.9
    Subnet Mask . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . : 192.168.2.8
    Primary WINS Server . . . . : 128.95.4.18
    Secondary WINS Server . . . : 198.95.4.19
  6. Your MAC address is the Physical Address listed

OSX

  1. From the Apple menu, select “System Preferences”
  2. Click on the “Network” icon
  3. From the list on the left, highlight the option desired, e.g., “Wi-Fi” or “Ethernet”
  4. From the options to the right, click the “Advanced” button
  5. From the tabs on the top, select “Hardware”
  6. Your MAC will be listed on this page

iOS

  1. Tap to open the “Settings” app
  2. Select “General”
  3. Select “About”
  4. The “Wi-Fi” address listed is your MAC address

Linux

  1. At the Linux command prompt, enter % /sbin/ifconfig eth0
  2. The returned information will include your MAC address, in a format like the following:
    00:A0:CC:23:39:3F