What this means
The IEEE assigned the MA-L block B4205B to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,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 B4:20:5B, it is GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix B4205B?
B4205B is registered to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,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. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD's block covers 16,777,216 addresses.
What devices use B4205B?
Any network device with a MAC address starting B4:20:5B was manufactured by or for GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD.