What this means
The IEEE assigned the MA-M block 4C917A1 to Inster Tecnología y Comunicaciones SAU. 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 4C:91:7A:1, it is Inster Tecnología y Comunicaciones SAU hardware.
Frequently Asked Questions
Who owns MAC prefix 4C917A1?
4C917A1 is registered to Inster Tecnología y Comunicaciones SAU 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. Inster Tecnología y Comunicaciones SAU's block covers 1,048,576 addresses.
What devices use 4C917A1?
Any network device with a MAC address starting 4C:91:7A:1 was manufactured by or for Inster Tecnología y Comunicaciones SAU.