What this means
The IEEE assigned the MA-L block ECF33C to Intel Corporate. 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:F3:3C, it is Intel Corporate hardware.
Frequently Asked Questions
Who owns MAC prefix ECF33C?
ECF33C is registered to Intel Corporate 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. Intel Corporate's block covers 16,777,216 addresses.
What devices use ECF33C?
Any network device with a MAC address starting EC:F3:3C was manufactured by or for Intel Corporate.