What this means
The IEEE assigned the MA-L block B4B542 to Hubbell Power Systems, Inc.. 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 B4:B5:42, it is Hubbell Power Systems, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix B4B542?
B4B542 is registered to Hubbell Power Systems, Inc. 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. Hubbell Power Systems, Inc.'s block covers 16,777,216 addresses.
What devices use B4B542?
Any network device with a MAC address starting B4:B5:42 was manufactured by or for Hubbell Power Systems, Inc..