What this means
The IEEE assigned the MA-L block B81D1F to HUAWEI TECHNOLOGIES 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 B8:1D:1F, it is HUAWEI TECHNOLOGIES CO.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix B81D1F?
B81D1F is registered to HUAWEI TECHNOLOGIES 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. HUAWEI TECHNOLOGIES CO.,LTD's block covers 16,777,216 addresses.
What devices use B81D1F?
Any network device with a MAC address starting B8:1D:1F was manufactured by or for HUAWEI TECHNOLOGIES CO.,LTD.