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Ethernet mac address format how to#
Ethernet mac address format for mac os x#

(Using the command"dmesg" will also display the MAC address - along with a lot of other information) Example "ifconfig -a" output: From the displayed information, find the Ethernet adapter (the name changes based on the Ethernet card installed).For this example, the actual MAC Address would be 00:03:ba:26:01:b0. The MAC Address will be displayed in the form of 0:3:ba:26:1:b0 - leading zeros are removed. From the displayed information, find the Ethernet adapter (it will probably be called le0 or ie0).The MAC Address will be displayed in the form of 00:08:C7:1B:8C:02.Įth0 Link encap:Ethernet HWaddr 00:08:C7:1B:8C:02 From the displayed information, find eth0 (this is the default first Ethernet adapter).As the root user (or user with appropriate permissions).

Ethernet mac address format how to#

Unix/Linux Vendor/Ethernet MAC Address Lookup and Search -> How to find/display your MAC Address -> Unix/Linux This string is your HW Address.MAC_Find: How to find/display your MAC Address - Unix/Linux How to find/display your MAC Address: After that heading will be an entry entitled Physical Address.

In the output, there will be a heading that begins with HWaddr.

From the command prompt type: /sbin/ifconfig.

Under that heading will be an entry entitled Physical Address.

In the output, there will be a heading that begins with Ethernet adapter.

Type cmd in the Open box and press ENTER.

Go to the Start Menu and click on Run.

Your Ethernet Hardware ID should be displayed.

Make sure the "TCP/IP" tab is selected.

Your Ethernet hardware ID is displayed on that screen.

Click the "Show" drop down menu and select "Built-in Ethernet.".

Open System Preferences and click the Network button. You can get to System Preferences from the Apple menu, or in the Applications folder.

You can find the ethernet hardware address of your network card in System Preferences' Network preference pane.

Ethernet mac address format for mac os x#

Instructions for Mac OS X 10.3 and later: If your card does not have the HW Address on it, or it is already installed in the computer, use the instructions below to determine the HW Address. Your HW address actually is 000094560e45.)

If it is not, you need to pad the beginning with 0's. NOTE: These strings may omit 0's at the beginning - make sure your HW Address is 12 characters long.

How do I Find the Ethernet HW Address on Various Operating Systems?Įxternal network adapters and some Ethernet cards will have the HW Address imprinted on them, have a sticker on them with the information, or it will be included in the manual.

With leading zeros dropped: 0:40:5:1c:e:9f (Note that when dropping leading zeroes, '00' is represented by '0'.).

Digits separated by a period: 0040.051c.0e9f.

Digits separated by spaces: 00 40 05 1C 0E 9F.

It may be referred to as either a hardware address, Ethernet address, NODE ID, adapter address, or MAC (medium access control) address, and might appear as: It was permanently assigned and "burnt in" to the card's electronics when it was manufactured and cannot be altered.Īn Ethernet card transmits its address with each packet of data, so it acts as a signature or fingerprint of your computer. Each digit must be a number between 0 and 9 or a letter between A and F ( Example: 0040051c0e9f ). It is a 6-byte hexadecimal number represented by 12 digits (12 digits in hex = 48 bits = 6 bytes). The Ethernet hardware address (HW Address) is your Ethernet card's unique identity.