What this means
The IEEE assigned the MA-L block 00128D to STB Datenservice 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 00:12:8D, it is STB Datenservice GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 00128D?
00128D is registered to STB Datenservice 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. STB Datenservice GmbH's block covers 16,777,216 addresses.
What devices use 00128D?
Any network device with a MAC address starting 00:12:8D was manufactured by or for STB Datenservice GmbH.