What this means
The IEEE assigned the MA-L block 000C03 to HDMI Licensing, LLC. 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 00:0C:03, it is HDMI Licensing, LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 000C03?
000C03 is registered to HDMI Licensing, LLC 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. HDMI Licensing, LLC's block covers 16,777,216 addresses.
What devices use 000C03?
Any network device with a MAC address starting 00:0C:03 was manufactured by or for HDMI Licensing, LLC.