This means that 2 24 (= 16.777.216) unique OUAs can be assigned per OUI.

Bit 25-48 (network adapter identifier): Bits 25 to 48 provide device manufacturers with 24 bits for assigning a unique hardware identifier (organizationally unique address, OUA).

Look for the entry with the heading 'HWaddr', the MAC address is the character string that follows. A corresponding service is available, for example, on . To obtain the MAC address for a Linux machine, execute the following shell command: /sbin/ifconfig. The assignment of OUIs is usually public and can be determined via databases.

Bit 3–24 (manufacturer identification): Bits 3 to 24 encode an identifier (organizationally unique identifier, OUI), which is assigned exclusively to hardware manufacturers by IEEE.

Addresses that are only locally unique are called locally administered address (LAA) and are marked with U/L = 1. For this, you can use the following command: ifconfig -a. Find out the network interface for which you want to change the MAC address. To install it in Debian / Ubuntu / Linux Mint, use: sudo apt install macchanger. If U/L = 0, the address is valid worldwide as a universally administered address (UAA). Macchanger should be in the repositories for major Linux distributions.

Bit 2 (registry): The second bit of the MAC address indicates whether it is an address with global validity (universal) or whether the address has been assigned locally (local).

Multicast addresses are identified by I/G = 1 and are addressed to several receivers.

If I/G = 0, it is a unicast address for a single network adapter. This bit is called I/G (short for individual/group).

Bit 1 (receiver): The first bit of the MAC address specifies whether it is an individual or group address.

On the welcome screen, below the Select your language: and Select your keyboard: drop-down menus, you will see a Select a network menu. The bit sequence of each MAC address is divided into 4 areas, each of which encodes different information. If you havent set up your Chromebook and are seeing the Chrome 'Welcome' screen, theres a third way to find the MAC address.

How to check mac address linux