What this means
The IEEE assigned the MA-L block 30BE3B to Mitsubishi Electric Corporation. 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 30:BE:3B, it is Mitsubishi Electric Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 30BE3B?
30BE3B is registered to Mitsubishi Electric Corporation 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. Mitsubishi Electric Corporation's block covers 16,777,216 addresses.
What devices use 30BE3B?
Any network device with a MAC address starting 30:BE:3B was manufactured by or for Mitsubishi Electric Corporation.