What this means
The IEEE assigned the MA-L block 3C300C to Dewar Electronics Pty Ltd. 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 3C:30:0C, it is Dewar Electronics Pty Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 3C300C?
3C300C is registered to Dewar Electronics Pty Ltd 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. Dewar Electronics Pty Ltd's block covers 16,777,216 addresses.
What devices use 3C300C?
Any network device with a MAC address starting 3C:30:0C was manufactured by or for Dewar Electronics Pty Ltd.