What this means
The IEEE assigned the MA-L block B87424 to Viessmann Elektronik 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 B8:74:24, it is Viessmann Elektronik GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix B87424?
B87424 is registered to Viessmann Elektronik 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. Viessmann Elektronik GmbH's block covers 16,777,216 addresses.
What devices use B87424?
Any network device with a MAC address starting B8:74:24 was manufactured by or for Viessmann Elektronik GmbH.