What this means
The IEEE assigned the MA-L block 00019B to Kyoto Microcomputer 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 00:01:9B, it is Kyoto Microcomputer Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 00019B?
00019B is registered to Kyoto Microcomputer 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. Kyoto Microcomputer Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 00019B?
Any network device with a MAC address starting 00:01:9B was manufactured by or for Kyoto Microcomputer Co., Ltd..