What this means
The IEEE assigned the MA-L block 00D055 to KATHREIN-WERKE KG. 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:D0:55, it is KATHREIN-WERKE KG hardware.
Frequently Asked Questions
Who owns MAC prefix 00D055?
00D055 is registered to KATHREIN-WERKE KG 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. KATHREIN-WERKE KG's block covers 16,777,216 addresses.
What devices use 00D055?
Any network device with a MAC address starting 00:D0:55 was manufactured by or for KATHREIN-WERKE KG.