Who owns MAC prefix 781305B?

781305B is registered to Bithouse Oy in the IEEE MA-M registry.

What devices use 781305B?

Any network device with a MAC address starting 78:13:05:B was manufactured by or for Bithouse Oy.

MA-M · OUI prefix

Bithouse Oy

Any MAC address starting 78:13:05:B is registered to Bithouse Oy in FI.

OUI prefix	781305B
Vendor	Bithouse Oy
Registry	MA-M (28-bit, medium block)
Country	FI
Example MAC	78:13:05:B:00:00:00

What this means

The IEEE assigned the MA-M block 781305B to Bithouse 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 78:13:05:B, it is Bithouse Oy hardware.

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