What this means
The IEEE assigned the MA-L block F89D0D to Control Technology 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 F8:9D:0D, it is Control Technology Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix F89D0D?
F89D0D is registered to Control Technology 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. Control Technology Inc.'s block covers 16,777,216 addresses.
What devices use F89D0D?
Any network device with a MAC address starting F8:9D:0D was manufactured by or for Control Technology Inc..