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).A corresponding service is available, for example, on. 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. (space between g and /) Alternatively, if using Windows XP, you can use the command getmac. A MAC address is a series of letters and numbers that identifies the network adapter to other hardware on a. At the command prompt, type ipconfig /all without quotes. Every device that connects to the internet has a Media Access Control (MAC) address. Find the section that describes the adapter you want to find the MAC address of. In the Command Prompt window type getmac /v /fo list 4. Type cmd and press Enter to launch the command prompt. If U/L = 0, the address is valid worldwide as a universally administered address (UAA). You can know your MAC address using the following steps: Click on the Start Menu. Press the Windows Start key to open the Start screen. 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.The bit sequence of each MAC address is divided into 4 areas, each of which encodes different information.

How to know mac address of laptop