What this means
The IEEE assigned the MA-L block 904506 to Tokyo Boeki Medisys Inc.. 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 90:45:06, it is Tokyo Boeki Medisys Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 904506?
904506 is registered to Tokyo Boeki Medisys Inc. 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. Tokyo Boeki Medisys Inc.'s block covers 16,777,216 addresses.
What devices use 904506?
Any network device with a MAC address starting 90:45:06 was manufactured by or for Tokyo Boeki Medisys Inc..