What this means
The IEEE assigned the MA-L block 74B91E to Nanjing Bestway Automation System 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 74:B9:1E, it is Nanjing Bestway Automation System Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 74B91E?
74B91E is registered to Nanjing Bestway Automation System 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. Nanjing Bestway Automation System Co., Ltd's block covers 16,777,216 addresses.
What devices use 74B91E?
Any network device with a MAC address starting 74:B9:1E was manufactured by or for Nanjing Bestway Automation System Co., Ltd.