What this means
The IEEE assigned the MA-L block 04EE91 to x-fabric 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 04:EE:91, it is x-fabric GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 04EE91?
04EE91 is registered to x-fabric 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. x-fabric GmbH's block covers 16,777,216 addresses.
What devices use 04EE91?
Any network device with a MAC address starting 04:EE:91 was manufactured by or for x-fabric GmbH.