What this means
The IEEE assigned the MA-L block 00003B to i Controls, 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 00:00:3B, it is i Controls, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 00003B?
00003B is registered to i Controls, 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. i Controls, Inc.'s block covers 16,777,216 addresses.
What devices use 00003B?
Any network device with a MAC address starting 00:00:3B was manufactured by or for i Controls, Inc..