What this means
The IEEE assigned the MA-S block 001BC504B to Silicon Controls. 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 00:1B:C5:04:B, it is Silicon Controls hardware.
Frequently Asked Questions
Who owns MAC prefix 001BC504B?
001BC504B is registered to Silicon Controls in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Silicon Controls's block covers 4,096 addresses.
What devices use 001BC504B?
Any network device with a MAC address starting 00:1B:C5:04:B was manufactured by or for Silicon Controls.