What this means
The IEEE assigned the MA-L block B4157E to Celona 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 B4:15:7E, it is Celona Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix B4157E?
B4157E is registered to Celona 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. Celona Inc.'s block covers 16,777,216 addresses.
What devices use B4157E?
Any network device with a MAC address starting B4:15:7E was manufactured by or for Celona Inc..