OUI
OUI
OUI
In computer terminology, OUI represents the first 8 bytes of the MAC address that identifies the manufacturer of the network hardware. OUI stands for "organizationally unique identifier."
The first 3 bytes show this. It's called the OUI, Organizationally Unique Identifier. If you type "getmac" in windows, you should see the 6 byte address, and the first 3 bytes are the ones that you are concerned about. Each OUI is unique to the manufacturer of the network card.
There are 24 bits, or six hex characters, for the preamble of the MAC address (i.e., 00:11:22 in the MAC address 00:11:22:33:44:55 or 0011.2233.4455).
The Vendor ID (OUI) of the Sources NIC is the unique organizational identifier assigned to the manufacturer of the network interface card by the IEEE. The OUI is the first three bytes of the MAC address assigned to that device.
The Unique Station Identifier for the mac address F2-A1-23-BC-D3-41 is BC-D3-41A MAC address is made up of two parts. The first three groups of the address is known as an OUI (Organisationally Unique Identifier). The OUI identifies the manufacturer of the network device.The last three groups of the address are set by the manufacturer and should be unique.
48-bits. Probably so that there would be enough for every network device to have a worldwide unique address. This 48-bit address space contains potentially 2^48 or 281,474,976,710,656 possible MAC addresses. (2 to the 48th power.) Which will probably also run out (some day?) like IPv4 is running out and will be supposedly fixed by IPv6 which has a larger address spac
Intel. See here: http://standards.ieee.org/regauth/oui/oui.txt
The first 6 digits is the OUI(Organizationally Unique Identifiers given by vendors and then the last 6 digits are used to represent the NIC uniquely with the OUI value.
The UAA, or Universally Administered Address, is the most commonly used type of MAC address. This address is assigned to the network adapter when it is manufactured. The first three octets define the manufacturer, while the second three octets vary and identify the individual adapter. All network adapter manufacturers have their own code, called the Organizationally Unique Identifier (OUI).