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Knowledgebase
How to find a computer's MAC Address (Windows, Mac & Linux)
Posted by Donald Mccallum on 04 August 2015 05:58 PM

How to find a computer's MAC Address

Overview:

Follow these instructions if you need to find your computer's Media Access Control address (MAC address), the unique identifier of a network adapter.  The MAC address is a 6-digit hexadecimal number, which is normally written as a twelve character alphanumeric string with a colon (:) or other separating character after every second character :

Example of a MAC address:  00:00:00:a1:2b:cc

If you computer has more than one network adapter (for example, an ethernet adapter and a wireless adapter), it will have a different MAC address for each adapter.

Symptoms:

  • Want to find the MAC address of my computer
  • Need the MAC address for MAC Filtering

Windows

  1. Click on the Start button.
  2. In the Run text box, type cmd.  This will open the command window.
  3. At the command prompt, type ipconfig /all.
  4. Copy down the "Physical Address" (aka the MAC address) from the "Ethernet adapter Wireless Network Connection" section.
  5. Close the command prompt window.

Macintosh OS 10.4 and higher

  1. From the Apple icon in the upper left-hand corner of the desktop, select System Preferences.
  2. From the Internet & Wireless section, select Network.
  3. From the AirPort menu, click on the Advanced button.
  4. At the bottom of the AirPort tab, the MAC address is listed as AirPort ID.  Copy down the twelve digit alphanumeric string.
  5. To exit, click on the Cancel button of the AirPort info, then click on the red button in the upper left corner of the Network window.

Linux/Unix

Finding the MAC address varies across the different Linux/Unix operating systems.  In many systems, the following command will return the MAC address:

ifconfig -a

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