What this means
The IEEE assigned the MA-L block 0003B9 to Hualong Telecom 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 00:03:B9, it is Hualong Telecom Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 0003B9?
0003B9 is registered to Hualong Telecom 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. Hualong Telecom Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 0003B9?
Any network device with a MAC address starting 00:03:B9 was manufactured by or for Hualong Telecom Co., Ltd..