What this means
The IEEE assigned the MA-L block CC5D78 to JTD Consulting. 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 CC:5D:78, it is JTD Consulting hardware.
Frequently Asked Questions
Who owns MAC prefix CC5D78?
CC5D78 is registered to JTD Consulting 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. JTD Consulting's block covers 16,777,216 addresses.
What devices use CC5D78?
Any network device with a MAC address starting CC:5D:78 was manufactured by or for JTD Consulting.