What this means
The IEEE assigned the MA-L block 9CDD1F to Intelligent Steward 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 9C:DD:1F, it is Intelligent Steward Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 9CDD1F?
9CDD1F is registered to Intelligent Steward Co.,Ltd 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. Intelligent Steward Co.,Ltd's block covers 16,777,216 addresses.
What devices use 9CDD1F?
Any network device with a MAC address starting 9C:DD:1F was manufactured by or for Intelligent Steward Co.,Ltd.