What this means
The IEEE assigned the MA-L block C4393A to SMC Networks 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 C4:39:3A, it is SMC Networks Inc hardware.
Frequently Asked Questions
Who owns MAC prefix C4393A?
C4393A is registered to SMC Networks 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. SMC Networks Inc's block covers 16,777,216 addresses.
What devices use C4393A?
Any network device with a MAC address starting C4:39:3A was manufactured by or for SMC Networks Inc.