What this means
The IEEE assigned the MA-L block D4741B to Beijing HuaDa ZhiBao Electronic 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 D4:74:1B, it is Beijing HuaDa ZhiBao Electronic System Co.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix D4741B?
D4741B is registered to Beijing HuaDa ZhiBao Electronic 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. Beijing HuaDa ZhiBao Electronic System Co.,Ltd.'s block covers 16,777,216 addresses.
What devices use D4741B?
Any network device with a MAC address starting D4:74:1B was manufactured by or for Beijing HuaDa ZhiBao Electronic System Co.,Ltd..