What this means
The IEEE assigned the MA-L block 3CB15B to Avaya Inc. 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 3C:B1:5B, it is Avaya Inc hardware.
Frequently Asked Questions
Who owns MAC prefix 3CB15B?
3CB15B is registered to Avaya Inc 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. Avaya Inc's block covers 16,777,216 addresses.
What devices use 3CB15B?
Any network device with a MAC address starting 3C:B1:5B was manufactured by or for Avaya Inc.