What this means
The IEEE assigned the MA-L block 00012B to TELENET 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 00:01:2B, it is TELENET Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 00012B?
00012B is registered to TELENET 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. TELENET Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 00012B?
Any network device with a MAC address starting 00:01:2B was manufactured by or for TELENET Co., Ltd..