What this means
The IEEE assigned the MA-L block C400B5 to HongKong Tenry 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 C4:00:B5, it is HongKong Tenry Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix C400B5?
C400B5 is registered to HongKong Tenry 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. HongKong Tenry Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use C400B5?
Any network device with a MAC address starting C4:00:B5 was manufactured by or for HongKong Tenry Technology Co., Ltd..