What this means
The IEEE assigned the MA-L block 3C9157 to Yulong Computer Telecommunication Scientific (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 3C:91:57, it is Yulong Computer Telecommunication Scientific (Shenzhen) Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 3C9157?
3C9157 is registered to Yulong Computer Telecommunication Scientific (Shenzhen) 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. Yulong Computer Telecommunication Scientific (Shenzhen) Co.,Ltd's block covers 16,777,216 addresses.
What devices use 3C9157?
Any network device with a MAC address starting 3C:91:57 was manufactured by or for Yulong Computer Telecommunication Scientific (Shenzhen) Co.,Ltd.