What this means
The IEEE assigned the MA-L block B4C9B9 to Sichuan AI-Link Technology 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:C9:B9, it is Sichuan AI-Link Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix B4C9B9?
B4C9B9 is registered to Sichuan AI-Link Technology 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 AI-Link Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use B4C9B9?
Any network device with a MAC address starting B4:C9:B9 was manufactured by or for Sichuan AI-Link Technology Co., Ltd..