What this means
The IEEE assigned the MA-L block ECFA03 to FCA. 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 EC:FA:03, it is FCA hardware.
Frequently Asked Questions
Who owns MAC prefix ECFA03?
ECFA03 is registered to FCA 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. FCA's block covers 16,777,216 addresses.
What devices use ECFA03?
Any network device with a MAC address starting EC:FA:03 was manufactured by or for FCA.