What this means
The IEEE assigned the MA-M block 7C45F9C to Xemex NV. 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 7C:45:F9:C, it is Xemex NV hardware.
Frequently Asked Questions
Who owns MAC prefix 7C45F9C?
7C45F9C is registered to Xemex NV 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. Xemex NV's block covers 1,048,576 addresses.
What devices use 7C45F9C?
Any network device with a MAC address starting 7C:45:F9:C was manufactured by or for Xemex NV.