What this means
The IEEE assigned the MA-M block 3CDC031 to Zaptec. 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:DC:03:1, it is Zaptec hardware.
Frequently Asked Questions
Who owns MAC prefix 3CDC031?
3CDC031 is registered to Zaptec in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Zaptec's block covers 1,048,576 addresses.
What devices use 3CDC031?
Any network device with a MAC address starting 3C:DC:03:1 was manufactured by or for Zaptec.