What this means
The IEEE assigned the MA-M block EC74CDC to Smart Data (Shenzhen) Intelligent System Co., 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 EC:74:CD:C, it is Smart Data (Shenzhen) Intelligent System Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix EC74CDC?
EC74CDC is registered to Smart Data (Shenzhen) Intelligent System Co., Ltd. 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. Smart Data (Shenzhen) Intelligent System Co., Ltd.'s block covers 1,048,576 addresses.
What devices use EC74CDC?
Any network device with a MAC address starting EC:74:CD:C was manufactured by or for Smart Data (Shenzhen) Intelligent System Co., Ltd..