What this means
The IEEE assigned the MA-L block B4466B to REALTIMEID AS. 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 B4:46:6B, it is REALTIMEID AS hardware.
Frequently Asked Questions
Who owns MAC prefix B4466B?
B4466B is registered to REALTIMEID AS 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. REALTIMEID AS's block covers 16,777,216 addresses.
What devices use B4466B?
Any network device with a MAC address starting B4:46:6B was manufactured by or for REALTIMEID AS.