What this means
The IEEE assigned the MA-L block ACDB22 to Marquardt Schaltsysteme SCS. 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 AC:DB:22, it is Marquardt Schaltsysteme SCS hardware.
Frequently Asked Questions
Who owns MAC prefix ACDB22?
ACDB22 is registered to Marquardt Schaltsysteme SCS 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. Marquardt Schaltsysteme SCS's block covers 16,777,216 addresses.
What devices use ACDB22?
Any network device with a MAC address starting AC:DB:22 was manufactured by or for Marquardt Schaltsysteme SCS.