What this means
The IEEE assigned the MA-S block 8C1F647BB to Kotsu Dengyosha 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 8C:1F:64:7B:B, it is Kotsu Dengyosha Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 8C1F647BB?
8C1F647BB is registered to Kotsu Dengyosha Co., Ltd. in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Kotsu Dengyosha Co., Ltd.'s block covers 4,096 addresses.
What devices use 8C1F647BB?
Any network device with a MAC address starting 8C:1F:64:7B:B was manufactured by or for Kotsu Dengyosha Co., Ltd..