What this means
The IEEE assigned the MA-M block 1C5974D to Shenzhen Geshem Technology 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 1C:59:74:D, it is Shenzhen Geshem Technology Co Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 1C5974D?
1C5974D is registered to Shenzhen Geshem Technology 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. Shenzhen Geshem Technology Co Ltd's block covers 1,048,576 addresses.
What devices use 1C5974D?
Any network device with a MAC address starting 1C:59:74:D was manufactured by or for Shenzhen Geshem Technology Co Ltd.