What this means
The IEEE assigned the MA-L block 00213B to Berkshire Products, 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 00:21:3B, it is Berkshire Products, Inc hardware.
Frequently Asked Questions
Who owns MAC prefix 00213B?
00213B is registered to Berkshire Products, 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. Berkshire Products, Inc's block covers 16,777,216 addresses.
What devices use 00213B?
Any network device with a MAC address starting 00:21:3B was manufactured by or for Berkshire Products, Inc.