What this means
The IEEE assigned the MA-L block B4DF3B to Chromlech. 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:DF:3B, it is Chromlech hardware.
Frequently Asked Questions
Who owns MAC prefix B4DF3B?
B4DF3B is registered to Chromlech 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. Chromlech's block covers 16,777,216 addresses.
What devices use B4DF3B?
Any network device with a MAC address starting B4:DF:3B was manufactured by or for Chromlech.