What this means
The IEEE assigned the MA-L block B4FC75 to SEMA Electronics(HK) CO.,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:FC:75, it is SEMA Electronics(HK) CO.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix B4FC75?
B4FC75 is registered to SEMA Electronics(HK) CO.,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. SEMA Electronics(HK) CO.,LTD's block covers 16,777,216 addresses.
What devices use B4FC75?
Any network device with a MAC address starting B4:FC:75 was manufactured by or for SEMA Electronics(HK) CO.,LTD.