What this means
The IEEE assigned the MA-L block 8C4DB9 to Unmonday Ltd. 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 8C:4D:B9, it is Unmonday Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 8C4DB9?
8C4DB9 is registered to Unmonday Ltd 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. Unmonday Ltd's block covers 16,777,216 addresses.
What devices use 8C4DB9?
Any network device with a MAC address starting 8C:4D:B9 was manufactured by or for Unmonday Ltd.