What this means
The IEEE assigned the MA-L block AC919B to WNC Corporation. 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 AC:91:9B, it is WNC Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix AC919B?
AC919B is registered to WNC Corporation 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. WNC Corporation's block covers 16,777,216 addresses.
What devices use AC919B?
Any network device with a MAC address starting AC:91:9B was manufactured by or for WNC Corporation.