![]() The IEEE claims trademarks on the names EUI-48 and EUI-64, in which EUI is an abbreviation for Extended Unique Identifier. MAC addresses are formed according to the rules of one of three numbering name spaces managed by the Institute of Electrical and Electronics Engineers (IEEE): MAC-48, EUI-48, and EUI-64. This can be contrasted to a programmed address, where the host device issues commands to the NIC to use an arbitrary address.Ī network node may have multiple NICs and each must have one unique MAC address per NIC. It may also be known as an Ethernet hardware address ( EHA), hardware address or physical address. If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number and may be referred to as the burned-in address ( BIA). ![]() MAC addresses are most often assigned by the manufacturer of a network interface controller (NIC) and are stored in its hardware, such as the card's read-only memory or some other firmware mechanism. Logically, MAC addresses are used in the media access control protocol sublayer of the OSI reference model. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet. MAC address A media access control address ( MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. Uses several databases including NMAP, IEEE Official List, Wireshark Info, and more.Partial searches are accepted: 001c, 2359:92. ![]() This structure ensures that MAC addresses are globally unique and allows network administrators to determine the manufacturer of a device based on its MAC address.Discover which company built a networked interface by MAC Address. The assignment of MAC addresses to vendors is based on a hierarchical structure, with the most significant bits of the MAC address identifying the vendor and the remaining bits specifying the specific device. The assignment of MAC addresses to vendors is managed by the IEEE's Registration Authority, which is responsible for allocating blocks of MAC addresses to vendors and ensuring that the assignment process is managed fairly and efficiently. The MAC address is unique to each NIC, so each device that connects to a network has its own unique MAC address. The IEEE assigns MAC addresses from a unique block of addresses to vendors, who then include the MAC address in the firmware of each network interface controller (NIC) they produce. MAC addresses are assigned to vendors by the IEEE. The MAC address is used to specify a destination in a network frame and to ensure that the data is sent to the correct device. It serves as the hardware address of the device and is used by the data link layer of the OSI Model. The MAC address is used by the network protocol to identify a unique device on the network. This format is standardized by the Institute of Electrical and Electronics Engineers (IEEE). This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth.Ī MAC address consists of a sequence of six pairs of hexadecimal digits separated by colons, such as "00:06:5B:11:22:33". MAC address (Media Access Control address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment.
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