What this means
The IEEE assigned the MA-L block B4EFFA to Lemobile Information Technology (Beijing) 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:EF:FA, it is Lemobile Information Technology (Beijing) Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix B4EFFA?
B4EFFA is registered to Lemobile Information Technology (Beijing) 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. Lemobile Information Technology (Beijing) Co., Ltd.'s block covers 16,777,216 addresses.
What devices use B4EFFA?
Any network device with a MAC address starting B4:EF:FA was manufactured by or for Lemobile Information Technology (Beijing) Co., Ltd..