What this means
The IEEE assigned the MA-L block 902181 to Shanghai Huaqin Telecom Technology 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 90:21:81, it is Shanghai Huaqin Telecom Technology Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 902181?
902181 is registered to Shanghai Huaqin Telecom Technology 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. Shanghai Huaqin Telecom Technology Co.,Ltd's block covers 16,777,216 addresses.
What devices use 902181?
Any network device with a MAC address starting 90:21:81 was manufactured by or for Shanghai Huaqin Telecom Technology Co.,Ltd.