What this means
The IEEE assigned the MA-M block 04ECA9C to Broadcom Corporation. 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 04:EC:A9:C, it is Broadcom Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 04ECA9C?
04ECA9C is registered to Broadcom Corporation 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. Broadcom Corporation's block covers 1,048,576 addresses.
What devices use 04ECA9C?
Any network device with a MAC address starting 04:EC:A9:C was manufactured by or for Broadcom Corporation.