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.
Frequently Asked Questions
Who owns MAC prefix 781305B?
781305B is registered to Bithouse Oy in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Bithouse Oy's block covers 1,048,576 addresses.
What devices use 781305B?
Any network device with a MAC address starting 78:13:05:B was manufactured by or for Bithouse Oy.