What this means
The IEEE assigned the MA-L block B4E842 to Hong Kong Bouffalo Lab Limited. 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:E8:42, it is Hong Kong Bouffalo Lab Limited hardware.
Frequently Asked Questions
Who owns MAC prefix B4E842?
B4E842 is registered to Hong Kong Bouffalo Lab Limited 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. Hong Kong Bouffalo Lab Limited's block covers 16,777,216 addresses.
What devices use B4E842?
Any network device with a MAC address starting B4:E8:42 was manufactured by or for Hong Kong Bouffalo Lab Limited.