What this means
The IEEE assigned the MA-M block C09BF47 to Big Dutchman International GmbH. 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 C0:9B:F4:7, it is Big Dutchman International GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix C09BF47?
C09BF47 is registered to Big Dutchman International GmbH 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. Big Dutchman International GmbH's block covers 1,048,576 addresses.
What devices use C09BF47?
Any network device with a MAC address starting C0:9B:F4:7 was manufactured by or for Big Dutchman International GmbH.