What this means
The IEEE assigned the MA-L block 148121 to TOP WING Corporation. 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 14:81:21, it is TOP WING Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 148121?
148121 is registered to TOP WING Corporation 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. TOP WING Corporation's block covers 16,777,216 addresses.
What devices use 148121?
Any network device with a MAC address starting 14:81:21 was manufactured by or for TOP WING Corporation.