What this means
The IEEE assigned the MA-L block B4D64E to Caldero Limited. 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:D6:4E, it is Caldero Limited hardware.
Frequently Asked Questions
Who owns MAC prefix B4D64E?
B4D64E is registered to Caldero Limited 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. Caldero Limited's block covers 16,777,216 addresses.
What devices use B4D64E?
Any network device with a MAC address starting B4:D6:4E was manufactured by or for Caldero Limited.