What this means
The IEEE assigned the MA-L block DCF51B to Arcadyan 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 DC:F5:1B, it is Arcadyan Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix DCF51B?
DCF51B is registered to Arcadyan Corporation 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. Arcadyan Corporation's block covers 16,777,216 addresses.
What devices use DCF51B?
Any network device with a MAC address starting DC:F5:1B was manufactured by or for Arcadyan Corporation.