What this means
The IEEE assigned the MA-L block D09B05 to Emtronix. 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 D0:9B:05, it is Emtronix hardware.
Frequently Asked Questions
Who owns MAC prefix D09B05?
D09B05 is registered to Emtronix 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. Emtronix's block covers 16,777,216 addresses.
What devices use D09B05?
Any network device with a MAC address starting D0:9B:05 was manufactured by or for Emtronix.