What this means
The IEEE assigned the MA-L block 000C5C to GTN Systems B.V.. 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 00:0C:5C, it is GTN Systems B.V. hardware.
Frequently Asked Questions
Who owns MAC prefix 000C5C?
000C5C is registered to GTN Systems B.V. 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. GTN Systems B.V.'s block covers 16,777,216 addresses.
What devices use 000C5C?
Any network device with a MAC address starting 00:0C:5C was manufactured by or for GTN Systems B.V..