What this means
The IEEE assigned the MA-L block 00090B to MTL Instruments PLC. 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 00:09:0B, it is MTL Instruments PLC hardware.
Frequently Asked Questions
Who owns MAC prefix 00090B?
00090B is registered to MTL Instruments PLC 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. MTL Instruments PLC's block covers 16,777,216 addresses.
What devices use 00090B?
Any network device with a MAC address starting 00:09:0B was manufactured by or for MTL Instruments PLC.