What this means
The IEEE assigned the MA-M block 5C5C755 to YingKeSong Pen Industry Technology R&D Center Shenzhen 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 5C:5C:75:5, it is YingKeSong Pen Industry Technology R&D Center Shenzhen Co Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 5C5C755?
5C5C755 is registered to YingKeSong Pen Industry Technology R&D Center Shenzhen 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. YingKeSong Pen Industry Technology R&D Center Shenzhen Co Ltd's block covers 1,048,576 addresses.
What devices use 5C5C755?
Any network device with a MAC address starting 5C:5C:75:5 was manufactured by or for YingKeSong Pen Industry Technology R&D Center Shenzhen Co Ltd.