What this means
The IEEE assigned the MA-M block 90F4219 to Twunicom Life Tech. 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:F4:21:9, it is Twunicom Life Tech. Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 90F4219?
90F4219 is registered to Twunicom Life Tech. Co., Ltd. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Twunicom Life Tech. Co., Ltd.'s block covers 1,048,576 addresses.
What devices use 90F4219?
Any network device with a MAC address starting 90:F4:21:9 was manufactured by or for Twunicom Life Tech. Co., Ltd..