What this means
The IEEE assigned the MA-L block 000C91 to Riverhead Networks 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 00:0C:91, it is Riverhead Networks Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 000C91?
000C91 is registered to Riverhead Networks 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. Riverhead Networks Inc.'s block covers 16,777,216 addresses.
What devices use 000C91?
Any network device with a MAC address starting 00:0C:91 was manufactured by or for Riverhead Networks Inc..