Who owns MAC prefix BC9740D?

BC9740D is registered to Rollock Oy in the IEEE MA-M registry.

What devices use BC9740D?

Any network device with a MAC address starting BC:97:40:D was manufactured by or for Rollock Oy.

MA-M · OUI prefix

Rollock Oy

Any MAC address starting BC:97:40:D is registered to Rollock Oy in FI.

OUI prefix	BC9740D
Vendor	Rollock Oy
Registry	MA-M (28-bit, medium block)
Country	FI
Example MAC	BC:97:40:D:00:00:00

What this means

The IEEE assigned the MA-M block BC9740D to Rollock Oy. 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 BC:97:40:D, it is Rollock Oy hardware.

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