What this means
The IEEE assigned the MA-L block B4055D to IEIT SYSTEMS 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 B4:05:5D, it is IEIT SYSTEMS Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix B4055D?
B4055D is registered to IEIT SYSTEMS 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. IEIT SYSTEMS Co., Ltd.'s block covers 16,777,216 addresses.
What devices use B4055D?
Any network device with a MAC address starting B4:05:5D was manufactured by or for IEIT SYSTEMS Co., Ltd..