This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth. What is an IEEE address?Ī media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. MAC address consists of a 24 bit manufacturer prefix – OUI (Organizationally Unique Identifier) and a 24 bit device identifier (meaning there can exist 2^24 = cca 17 million devices within a single OUI). How many MAC Addresses can a vendor generate with a single OUI vendor code?
Directions: Type or paste in a list of OUIs, MAC addresses, or descriptions below. It uses the Wireshark manufacturer database, which is a list of OUIs and MAC addresses compiled from a number of sources. The Wireshark OUI lookup tool provides an easy way to look up OUIs and other MAC address prefixes. You can use MAC addresses in MAC filters (see “MAC Filters”) and as the source and destination in MAC firewall policy rules (see “MAC Firewall Policy Settings”). The first 24 bits, known as the Organizationally Unique Identifier (OUI), identify the manufacturer.Īn OUI is the first 6 hexadecimal digits of a MAC address and identifies the vendor that produced the NIC.
Which part of an OUI identifies the manufacturer? The OUI is the first three bytes of the six-byte field and is administered by the IEEE. (Organizational Unique Identifier) The part of the MAC address that identifies the vendor of the network adapter.
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