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John R
Asked: 2012-05-01 07:02:50 +0800 CST

Look up manufacturer based on Mac Address?

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I want to incorporate into a piece of software the ability to look up a manufacturer based on a mac address. By googling "mac address lookup" and similar, I have noticed several websites that make this correlation which suggests this data source is available somewhere. Where can I find this data source that correlates a mac address (input) with a manufacturer (output)?

networking mac-address device

3 Answers

  1. Best Answer

    The first half (24 bits) of your mac-address is called an OUI (Organizationally Unique Identifier), and identifies the company. The list is available on ieee.org:

    http://standards.ieee.org/develop/regauth/oui/oui.txt

    They are formatted like this:

    00-03-93   (hex)        Apple Computer, Inc.
000393     (base 16)    Apple Computer, Inc.
                        20650 Valley Green Dr.
                        Cupertino CA 95014
                        UNITED STATES

    The gaps between sequential hex-numbers are probably Privately Registered OUI's. There is no open list for those, but I've never encountered a MAC-address in such ranges.

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  2. As @Bart De Vos says the IEEE maintains the canonical list of OUIs. Additionally there is an Individual Address Block (IAB) list at http://standards.ieee.org/develop/regauth/iab/iab.txt. However, entries can be privately registered which means that they will be omitted from oui.txt and iab.txt. The Wireshark development team maintains a much more complete list:

    https://code.wireshark.org/review/gitweb?p=wireshark.git;a=blob_plain;f=manuf

    We pull entries from the IEEE's public OUI and IAB lists, individual contributors and any other source we can.

    The Nmap team maintains a separate list at http://nmap.org/svn/nmap-mac-prefixes.

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  3. You might have better luck pulling this out via Hardware ID, which is a lot more specific, and harder to spoof

    PCI\VEN_8086&DEV_10EA&SUBSYS_040A1028&REV_05

    you should be able to get it via a simple WMI call to Win32_PnPSignedDriver

    though unfortunately this would only work for Windows based machines.

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