What this means
The IEEE assigned the MA-L block D40C9D to SiFly Aviation, 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 D4:0C:9D, it is SiFly Aviation, Inc hardware.
Frequently Asked Questions
Who owns MAC prefix D40C9D?
D40C9D is registered to SiFly Aviation, 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. SiFly Aviation, Inc's block covers 16,777,216 addresses.
What devices use D40C9D?
Any network device with a MAC address starting D4:0C:9D was manufactured by or for SiFly Aviation, Inc.