What this means
The IEEE assigned the MA-L block EC4C4D to ZAO NPK RoTeK. 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 EC:4C:4D, it is ZAO NPK RoTeK hardware.
Frequently Asked Questions
Who owns MAC prefix EC4C4D?
EC4C4D is registered to ZAO NPK RoTeK 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. ZAO NPK RoTeK's block covers 16,777,216 addresses.
What devices use EC4C4D?
Any network device with a MAC address starting EC:4C:4D was manufactured by or for ZAO NPK RoTeK.