What this means
The IEEE assigned the MA-L block 0040F1 to CHUO ELECTRONICS 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:F1, it is CHUO ELECTRONICS CO., LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 0040F1?
0040F1 is registered to CHUO ELECTRONICS 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. CHUO ELECTRONICS CO., LTD.'s block covers 16,777,216 addresses.
What devices use 0040F1?
Any network device with a MAC address starting 00:40:F1 was manufactured by or for CHUO ELECTRONICS CO., LTD..