What this means
The IEEE assigned the MA-M block B0C5CA0 to EM-Tech. 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 B0:C5:CA:0, it is EM-Tech hardware.
Frequently Asked Questions
Who owns MAC prefix B0C5CA0?
B0C5CA0 is registered to EM-Tech 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. EM-Tech's block covers 1,048,576 addresses.
What devices use B0C5CA0?
Any network device with a MAC address starting B0:C5:CA:0 was manufactured by or for EM-Tech.