What this means
The IEEE assigned the MA-M block ACEF922 to EVA Precision Industrial Holdings Limited. 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 AC:EF:92:2, it is EVA Precision Industrial Holdings Limited hardware.
Frequently Asked Questions
Who owns MAC prefix ACEF922?
ACEF922 is registered to EVA Precision Industrial Holdings Limited 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. EVA Precision Industrial Holdings Limited's block covers 1,048,576 addresses.
What devices use ACEF922?
Any network device with a MAC address starting AC:EF:92:2 was manufactured by or for EVA Precision Industrial Holdings Limited.