What this means
The IEEE assigned the MA-L block 681D4C to Kontron eSystems 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 68:1D:4C, it is Kontron eSystems GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 681D4C?
681D4C is registered to Kontron eSystems 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. Kontron eSystems GmbH's block covers 16,777,216 addresses.
What devices use 681D4C?
Any network device with a MAC address starting 68:1D:4C was manufactured by or for Kontron eSystems GmbH.