What this means
The IEEE assigned the MA-L block C4C919 to Energy Imports Ltd. 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 C4:C9:19, it is Energy Imports Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix C4C919?
C4C919 is registered to Energy Imports Ltd 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. Energy Imports Ltd's block covers 16,777,216 addresses.
What devices use C4C919?
Any network device with a MAC address starting C4:C9:19 was manufactured by or for Energy Imports Ltd.