What this means
The IEEE assigned the MA-L block B4C0C3 to TP-Link Systems Inc.. 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:C0:C3, it is TP-Link Systems Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix B4C0C3?
B4C0C3 is registered to TP-Link Systems Inc. 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. TP-Link Systems Inc.'s block covers 16,777,216 addresses.
What devices use B4C0C3?
Any network device with a MAC address starting B4:C0:C3 was manufactured by or for TP-Link Systems Inc..