What this means
The IEEE assigned the MA-L block 0090E9 to JANZ COMPUTER AG. 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 00:90:E9, it is JANZ COMPUTER AG hardware.
Frequently Asked Questions
Who owns MAC prefix 0090E9?
0090E9 is registered to JANZ COMPUTER AG 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. JANZ COMPUTER AG's block covers 16,777,216 addresses.
What devices use 0090E9?
Any network device with a MAC address starting 00:90:E9 was manufactured by or for JANZ COMPUTER AG.