What this means
The IEEE assigned the MA-M block 9C431EA to ST Access Control System Corp.. 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:A, it is ST Access Control System Corp. hardware.
Frequently Asked Questions
Who owns MAC prefix 9C431EA?
9C431EA is registered to ST Access Control System Corp. 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. ST Access Control System Corp.'s block covers 1,048,576 addresses.
What devices use 9C431EA?
Any network device with a MAC address starting 9C:43:1E:A was manufactured by or for ST Access Control System Corp..