What this means
The IEEE assigned the MA-L block 00187B to 4NSYS 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 00:18:7B, it is 4NSYS Co. Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 00187B?
00187B is registered to 4NSYS 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. 4NSYS Co. Ltd.'s block covers 16,777,216 addresses.
What devices use 00187B?
Any network device with a MAC address starting 00:18:7B was manufactured by or for 4NSYS Co. Ltd..