What this means
The IEEE assigned the MA-L block B40142 to GCI Science & 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 B4:01:42, it is GCI Science & Technology Co.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix B40142?
B40142 is registered to GCI Science & Technology 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. GCI Science & Technology Co.,LTD's block covers 16,777,216 addresses.
What devices use B40142?
Any network device with a MAC address starting B4:01:42 was manufactured by or for GCI Science & Technology Co.,LTD.