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GET-OUI(1) General Commands Manual GET-OUI(1)


get-oui - Fetch the arp-scan OUI file from the ieee-data package


get-oui [options]


get-oui fetches the MAC/Vendor registry data from the ieee-data package and converts it to the format used by arp-scan. The contents of the following registries are processed:

MA-L 24-bit The original OUI registry
MA-M 28-bit Medium address block registry
MA-S 36-bit Small address block registry (OUI-36)
IAB 36-bit The IAB registry (closed for new applications)

This script creates /usr/share/arp-scan/ieee-oui.txt from the latest data on the ieee-data package. You can run # update-ieee-data && get-oui occasionally to keep the OUI file up to date.

The OUI data is fetched from ieee-data package files defined in the get-oui script and the output file is saved to the file /usr/share/arp-scan/ieee-oui.txt The output file name can be changed with the -f option.

The /usr/share/arp-scan/ieee-oui.txt file that is produced and updated by this script is used by arp-scan to determine the Ethernet card vendor from its hardware address.


Display a brief usage message and exit.
Write the output to the specified file instead of the default /usr/share/arp-scan/ieee-oui.txt.
Display verbose progress messages.


The default output file.


$ ./get-oui -v
Renaming ieee-oui.txt to ieee-oui.txt.bak
Opening ieee-oui.txt for output
Processing IEEE IAB registry data from file:///var/lib/ieee-data/iab.csv

Downloaded 381454 bytes
4575 IAB entries written to ieee-oui.txt Processing IEEE MAM registry data from file:///var/lib/ieee-data/mam.csv
Downloaded 492756 bytes
4477 MAM entries written to ieee-oui.txt Processing IEEE OUI registry data from file:///var/lib/ieee-data/oui.csv
Downloaded 3051812 bytes
32845 OUI entries written to ieee-oui.txt Processing IEEE OUI36 registry data from file:///var/lib/ieee-data/oui36.csv
Downloaded 466151 bytes
5131 OUI36 entries written to ieee-oui.txt Total of 47028 MAC/Vendor mappings written to ieee-oui.txt


get-oui is implemented in Perl, so you need to have the Perl interpreter installed on your system to use it.

get-oui uses the LWP::UserAgent and Text::CSV Perl modules to fetch and process the IEEE registry data. You must have these modules installed on your system for it to work. These modules are available on most distributions, often called libwww-perl and libtext-csv-perl. They are also available in source form from CPAN.

You can use a proxy server by defining the http_proxy environment variable.


October 28, 2022