What this means
The IEEE assigned the MA-M block 9C431E6 to R-S-I Elektrotechnik GmbH CO KG. 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:43:1E:6, it is R-S-I Elektrotechnik GmbH CO KG hardware.
Frequently Asked Questions
Who owns MAC prefix 9C431E6?
9C431E6 is registered to R-S-I Elektrotechnik GmbH CO KG in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. R-S-I Elektrotechnik GmbH CO KG's block covers 1,048,576 addresses.
What devices use 9C431E6?
Any network device with a MAC address starting 9C:43:1E:6 was manufactured by or for R-S-I Elektrotechnik GmbH CO KG.