What this means
The IEEE assigned the MA-L block 00125C to Green Hills Software, 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 00:12:5C, it is Green Hills Software, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 00125C?
00125C is registered to Green Hills Software, 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. Green Hills Software, Inc.'s block covers 16,777,216 addresses.
What devices use 00125C?
Any network device with a MAC address starting 00:12:5C was manufactured by or for Green Hills Software, Inc..