Who owns MAC prefix B8921D?

B8921D is registered to BG T&A in the IEEE MA-L registry.

What devices use B8921D?

Any network device with a MAC address starting B8:92:1D was manufactured by or for BG T&A.

MA-L · OUI prefix

BG T&A

Any MAC address starting B8:92:1D is registered to BG T&A in KR.

OUI prefix	B8921D
Vendor	BG T&A
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	B8:92:1D:00:00:00

What this means

The IEEE assigned the MA-L block B8921D to BG T&A. 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 B8:92:1D, it is BG T&A hardware.

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