What this means
The IEEE assigned the MA-M block 90A9F77 to GUANGDONG KERUIDE ELECTRICAL 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 90:A9:F7:7, it is GUANGDONG KERUIDE ELECTRICAL TECHNOLOGY CO., LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 90A9F77?
90A9F77 is registered to GUANGDONG KERUIDE ELECTRICAL TECHNOLOGY 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. GUANGDONG KERUIDE ELECTRICAL TECHNOLOGY CO., LTD.'s block covers 1,048,576 addresses.
What devices use 90A9F77?
Any network device with a MAC address starting 90:A9:F7:7 was manufactured by or for GUANGDONG KERUIDE ELECTRICAL TECHNOLOGY CO., LTD..