What this means
The IEEE assigned the MA-L block 08EF3B to MCS Logic 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 08:EF:3B, it is MCS Logic Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 08EF3B?
08EF3B is registered to MCS Logic 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. MCS Logic Inc.'s block covers 16,777,216 addresses.
What devices use 08EF3B?
Any network device with a MAC address starting 08:EF:3B was manufactured by or for MCS Logic Inc..