What this means
The IEEE assigned the MA-L block CCF538 to 3isysnetworks. 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:F5:38, it is 3isysnetworks hardware.
Frequently Asked Questions
Who owns MAC prefix CCF538?
CCF538 is registered to 3isysnetworks 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. 3isysnetworks's block covers 16,777,216 addresses.
What devices use CCF538?
Any network device with a MAC address starting CC:F5:38 was manufactured by or for 3isysnetworks.