What this means
The IEEE assigned the MA-L block 0040B9 to MACQ ELECTRONIQUE SA. 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 00:40:B9, it is MACQ ELECTRONIQUE SA hardware.
Frequently Asked Questions
Who owns MAC prefix 0040B9?
0040B9 is registered to MACQ ELECTRONIQUE SA 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. MACQ ELECTRONIQUE SA's block covers 16,777,216 addresses.
What devices use 0040B9?
Any network device with a MAC address starting 00:40:B9 was manufactured by or for MACQ ELECTRONIQUE SA.