What this means
The IEEE assigned the MA-L block AC915D to Digital Control Technology 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:91:5D, it is Digital Control Technology Limited hardware.
Frequently Asked Questions
Who owns MAC prefix AC915D?
AC915D is registered to Digital Control Technology Limited 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. Digital Control Technology Limited's block covers 16,777,216 addresses.
What devices use AC915D?
Any network device with a MAC address starting AC:91:5D was manufactured by or for Digital Control Technology Limited.