How to Determine Your MAC Address

Each network device has a unique address called a Media Access Control (MAC) address, consisting of 12 hexademical digits (eg. 00-12-34-AB-CD-EF). MAC addresses are a vital part of network communications, but generally you do not need to know the value except for wireless workstation filtering or IP address reservations via DHCP.

Windows Vista/2008/7/2008R2

1. Click Start , type CMD in the search box and press Enter.

2. Type:

   ipconfig /all | more

   (NB the piping symbol, |, is Shift-\)

   This will show information for each adaptor in the system, and scroll through the output a screen at a time.

   Press Enter until you see the information for the adaptor required.

   The MAC Address is shown next to Physical Address.

   Ethernet adapter Local Area Connection:
   
      Connection-specific DNS Suffix . :
      Description . . . . . . . . . . . : DEC DC21140 PCI Fast Ethernet Adapter
    → Physical Address. . . . . . . . . : 00-03-FF-9C-C2-F3
      DHCP Enabled. . . . . . . . . . . : Yes
      Autoconfiguration Enabled . . . . : Yes
      IPv4 Address. . . . . . . . . . . : 192.168.16.156(Preferred)
      Subnet Mask . . . . . . . . . . . : 255.255.255.0
      Lease Obtained. . . . . . . . . . : Thursday, 3 April 2008 12:53:42
      Lease Expires . . . . . . . . . . : Saturday, 5 April 2008 12:53:42
      Default Gateway . . . . . . . . . : 192.168.16.100
      DHCP Server . . . . . . . . . . . : 192.168.16.200
      Primary WINS Server . . . . . . . : 192.168.16.200
      NetBIOS over Tcpip. . . . . . . . : Enabled

3. Type Exit and press Enter to close the command prompt.

Windows NT/2000/XP/2003

1. Click Start, choose Run, type CMD and click OK.

2. Type:

   ipconfig /all | more

   (NB the piping symbol, |, is Shift-\)

   This will show information for each adaptor in the system, and scroll through the output a screen at a time.

   Press Enter until you see the information for the adaptor required.

   The MAC Address is shown next to Physical Address.

   Ethernet adapter DC21X41:
   
           Description . . . . . . . . : DEC DC21140 PCI Fast Ethernet Adapter
    →      Physical Address. . . . . . : 00-03-FF-9C-C2-F3
           DHCP Enabled. . . . . . . . : Yes
           IP Address. . . . . . . . . : 192.168.16.156
           Subnet Mask . . . . . . . . : 255.255.255.0
           Default Gateway . . . . . . : 192.168.16.100
           DHCP Server . . . . . . . . : 192.168.16.200
           Primary WINS Server . . . . : 192.168.16.200
           Lease Obtained. . . . . . . : Thursday, 3 April 2008 12:53:42
           Lease Expires . . . . . . . : Saturday, 5 April 2008 12:53:42

3. Type Exit and press Enter to close the command prompt.

Windows 95/98/Me

1. Click Start, choose Run, type WINIPCFG and click OK.

2. Choose the adaptor required from the drop-down list.

3. The MAC Address is shown next to Adapter Address.

MacOS X

1. Under System Preferences, choose Network.

2. Choose the desired location and network device (next to Show:).

   For wired ethernet connections, the MAC address is shown next to Ethernet Id under the Ethernet tab.

   For wireless AirPort connections, the MAC address is shown next to AirPort Id under the AirPort tab.

iPhone/iPad

Go to Settings → General → About. The MAC Address is shown next to Wi-Fi Address:

Apple TV

Go to Settings → General → Network.

The MAC Address is shown next to Wi-Fi Address.