What this means
The IEEE assigned the MA-L block 5CB8CB to Allis Communications. 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 5C:B8:CB, it is Allis Communications hardware.
Frequently Asked Questions
Who owns MAC prefix 5CB8CB?
5CB8CB is registered to Allis Communications 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. Allis Communications's block covers 16,777,216 addresses.
What devices use 5CB8CB?
Any network device with a MAC address starting 5C:B8:CB was manufactured by or for Allis Communications.