By a given MAC address, retrieve OUI vendor information, detect virtual machines, possible applications, read the information encoded in the MAC, and get our research's results regarding the MAC. Quick and easy MAC Address Lookups! Features include MAC address lookup, random MAC address generator, and API access to our database that you can use for whatever you want!
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MAC Address Block Large (MA-L)
This product was previously referred to as an OUI (Organizationally Unique Identifier) and is still referred to as such in many standards. OUI is an IEEE Registration Authority (RA) specific term that is referred to in various standards and may be used to identify companies on the IEEE Public Listing. A MA-L assignment includes an OUI and the right to generate various extended identifiers based on that OUI. It is most often used to create IEEE 802-defined MAC addresses (EUI-48 and EUI-64).
The OUI included in the MA-L assignment may be appended with 24 organization-supplied bits to form a EUI-48 or 40 organization-supplied bits to form an EUI-64.
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The included OUI may also be used to generate EUI-60 (deprecated), CDI-32, TCDI-40, MAC-48 (obsolete term), create multicast addresses (per IEEE Std 802), and as a unique root for various context dependent identifiers. It may also be used as a company identifier in those protocols and protocol standards that specify the use of a 3 octet field as a part of the protocol identification mechanism.
For more information, please see the tutorial “Guidelines for Use of Extended Unique Identifier (EUI), Organizationally Unique Identifier (OUI), and Company ID (CID)'.
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