What this means
The IEEE assigned the MA-L block B4CFE0 to Sichuan tianyi kanghe communications 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:CF:E0, it is Sichuan tianyi kanghe communications co., LTD hardware.
Frequently Asked Questions
Who owns MAC prefix B4CFE0?
B4CFE0 is registered to Sichuan tianyi kanghe communications 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. Sichuan tianyi kanghe communications co., LTD's block covers 16,777,216 addresses.
What devices use B4CFE0?
Any network device with a MAC address starting B4:CF:E0 was manufactured by or for Sichuan tianyi kanghe communications co., LTD.