What this means
The IEEE assigned the MA-L block 001993 to Changshu Switchgear MFG. Co.,Ltd. (Former Changshu Switchgea. 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 00:19:93, it is Changshu Switchgear MFG. Co.,Ltd. (Former Changshu Switchgea hardware.
Frequently Asked Questions
Who owns MAC prefix 001993?
001993 is registered to Changshu Switchgear MFG. Co.,Ltd. (Former Changshu Switchgea 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. Changshu Switchgear MFG. Co.,Ltd. (Former Changshu Switchgea's block covers 16,777,216 addresses.
What devices use 001993?
Any network device with a MAC address starting 00:19:93 was manufactured by or for Changshu Switchgear MFG. Co.,Ltd. (Former Changshu Switchgea.