Who owns MAC prefix B891C9?

B891C9 is registered to Handreamnet in the IEEE MA-L registry.

What devices use B891C9?

Any network device with a MAC address starting B8:91:C9 was manufactured by or for Handreamnet.

MA-L · OUI prefix

Handreamnet

Any MAC address starting B8:91:C9 is registered to Handreamnet in KR.

OUI prefix	B891C9
Vendor	Handreamnet
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	B8:91:C9:00:00:00

What this means

The IEEE assigned the MA-L block B891C9 to Handreamnet. 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 B8:91:C9, it is Handreamnet hardware.

Other Handreamnet prefixes

Handreamnet holds 3 registered blocks in total.

001AF4 FC75E6

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