What this means
The IEEE assigned the MA-L block B4009C to CableWorld 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 B4:00:9C, it is CableWorld Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix B4009C?
B4009C is registered to CableWorld 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. CableWorld Ltd.'s block covers 16,777,216 addresses.
What devices use B4009C?
Any network device with a MAC address starting B4:00:9C was manufactured by or for CableWorld Ltd..