The Notational Convention of MAC address consists of six groups of two hexadecimal digits separated by hyphens ( – ) or colons ( : ). What are the Notational Conventions in MAC Address? The OUI’s are recorded and issued to the manufacturers by IEEE. This OUI will help you in identify the manufacturer that is Cisco. This address contains the OUI of Cisco which is “ 00-14-22”. For instance, suppose a network card manufacturer by Cisco has an address “ 00-14-22-04-25-37”. OUI remains the same on NICs when manufactured by the same company. The identification of OUI is the first three sets of two hexadecimal in any MAC address. Organizational Unique Identifier (OUI) is the part of the MAC address that helps identify the network adapter. Cisco and Dell are the most popular and well-known NIC manufacturers. It is also known as Burned-In address (BIA) or ethernet address. The address is originally stored by the manufacturer. The network interface cards consist of MAC address which is always stored in hardware such as ROM, BIOS system, etc. Six groups of two hexadecimal digits make up the MAC Address. It identifies the hardware manufacturer and is used for network communication between devices in a network segment. It is also known as a physical or hardware address. Media Access Control (MAC) address is an extraordinary yet important identifier assigned to the network interfaces to communicate on the section of the particular physical network.įor instance: Network Interface Card (NIC) is a unique design for storing MAC addresses. Once you verify your device with the original mac address, these details are important and should be connected to the OUI database’s original vendor. The addresses contain the details of the device’s original manufacturer, prefix, and postfix of the particular mac address, along with the original manufacturing country. Mac address lookup tool is responsible for searching for mac addresses or OUI in the mac address vendor database, which contains a list of mac addresses of the registered devices to date.

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