What this means
The IEEE assigned the MA-L block 0003AC to Fronius Schweissmaschinen. 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 00:03:AC, it is Fronius Schweissmaschinen hardware.
Frequently Asked Questions
Who owns MAC prefix 0003AC?
0003AC is registered to Fronius Schweissmaschinen 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. Fronius Schweissmaschinen's block covers 16,777,216 addresses.
What devices use 0003AC?
Any network device with a MAC address starting 00:03:AC was manufactured by or for Fronius Schweissmaschinen.