What this means
The IEEE assigned the MA-L block 0040FC to IBR COMPUTER TECHNIK GMBH. 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 00:40:FC, it is IBR COMPUTER TECHNIK GMBH hardware.
Frequently Asked Questions
Who owns MAC prefix 0040FC?
0040FC is registered to IBR COMPUTER TECHNIK GMBH 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. IBR COMPUTER TECHNIK GMBH's block covers 16,777,216 addresses.
What devices use 0040FC?
Any network device with a MAC address starting 00:40:FC was manufactured by or for IBR COMPUTER TECHNIK GMBH.