What this means
The IEEE assigned the MA-M block A03E6BB to KoCoS Messtechnik AG. 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 A0:3E:6B:B, it is KoCoS Messtechnik AG hardware.
Frequently Asked Questions
Who owns MAC prefix A03E6BB?
A03E6BB is registered to KoCoS Messtechnik AG 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. KoCoS Messtechnik AG's block covers 1,048,576 addresses.
What devices use A03E6BB?
Any network device with a MAC address starting A0:3E:6B:B was manufactured by or for KoCoS Messtechnik AG.