What this means
The IEEE assigned the MA-L block 4CBCB4 to ABB SpA - DIN Rail. 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 4C:BC:B4, it is ABB SpA - DIN Rail hardware.
Frequently Asked Questions
Who owns MAC prefix 4CBCB4?
4CBCB4 is registered to ABB SpA - DIN Rail 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. ABB SpA - DIN Rail's block covers 16,777,216 addresses.
What devices use 4CBCB4?
Any network device with a MAC address starting 4C:BC:B4 was manufactured by or for ABB SpA - DIN Rail.