What this means
The IEEE assigned the MA-L block 00163B to Communications & Power Industries. 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 00:16:3B, it is Communications & Power Industries hardware.
Frequently Asked Questions
Who owns MAC prefix 00163B?
00163B is registered to Communications & Power Industries 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. Communications & Power Industries's block covers 16,777,216 addresses.
What devices use 00163B?
Any network device with a MAC address starting 00:16:3B was manufactured by or for Communications & Power Industries.