What this means
The IEEE assigned the MA-L block 9C0591 to Mellanox Technologies, 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 9C:05:91, it is Mellanox Technologies, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 9C0591?
9C0591 is registered to Mellanox Technologies, 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. Mellanox Technologies, Inc.'s block covers 16,777,216 addresses.
What devices use 9C0591?
Any network device with a MAC address starting 9C:05:91 was manufactured by or for Mellanox Technologies, Inc..