The Professional Monitor Company Ltd - MAC Prefix C09BF4D (MA-M)

What this means

The IEEE assigned the MA-M block C09BF4D to The Professional Monitor Company Ltd. 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:D, it is The Professional Monitor Company Ltd hardware.

Frequently Asked Questions

Who owns MAC prefix C09BF4D?

C09BF4D is registered to The Professional Monitor Company Ltd 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. The Professional Monitor Company Ltd's block covers 1,048,576 addresses.

What devices use C09BF4D?

Any network device with a MAC address starting C0:9B:F4:D was manufactured by or for The Professional Monitor Company Ltd.

OUI prefix	C09BF4D
Vendor	The Professional Monitor Company Ltd
Registry	MA-M (28-bit, medium block)
Block size	1,048,576 addresses
Country	GB
Other blocks by this vendor	1 total
Example MAC	C0:9B:F4:D:00:00:00