What this means
The IEEE assigned the MA-L block 002178 to Matuschek Messtechnik GmbH. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 00:21:78, it is Matuschek Messtechnik GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 002178?
002178 is registered to Matuschek Messtechnik GmbH in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Matuschek Messtechnik GmbH's block covers 16,777,216 addresses.
What devices use 002178?
Any network device with a MAC address starting 00:21:78 was manufactured by or for Matuschek Messtechnik GmbH.