What this means
The IEEE assigned the MA-L block 40BC8B to itelio 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 40:BC:8B, it is itelio GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 40BC8B?
40BC8B is registered to itelio GmbH in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. itelio GmbH's block covers 16,777,216 addresses.
What devices use 40BC8B?
Any network device with a MAC address starting 40:BC:8B was manufactured by or for itelio GmbH.