What this means
The IEEE assigned the MA-L block ACA667 to Electronic Systems Protection, Inc.. 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:A6:67, it is Electronic Systems Protection, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix ACA667?
ACA667 is registered to Electronic Systems Protection, Inc. in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Electronic Systems Protection, Inc.'s block covers 16,777,216 addresses.
What devices use ACA667?
Any network device with a MAC address starting AC:A6:67 was manufactured by or for Electronic Systems Protection, Inc..