What this means
The IEEE assigned the MA-L block 004001 to Zero One 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 00:40:01, it is Zero One Technology Co. Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 004001?
004001 is registered to Zero One 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. Zero One Technology Co. Ltd.'s block covers 16,777,216 addresses.
What devices use 004001?
Any network device with a MAC address starting 00:40:01 was manufactured by or for Zero One Technology Co. Ltd..