What this means
The IEEE assigned the MA-L block 0004B8 to Kumahira 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 00:04:B8, it is Kumahira Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 0004B8?
0004B8 is registered to Kumahira 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. Kumahira Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 0004B8?
Any network device with a MAC address starting 00:04:B8 was manufactured by or for Kumahira Co., Ltd..