Who owns MAC prefix B40566?

B40566 is registered to SP Best Corporation Co., LTD. in the IEEE MA-L registry.

What devices use B40566?

Any network device with a MAC address starting B4:05:66 was manufactured by or for SP Best Corporation Co., LTD..

MA-L · OUI prefix

SP Best Corporation Co., LTD.

Any MAC address starting B4:05:66 is registered to SP Best Corporation Co., LTD. in TH.

OUI prefix	B40566
Vendor	SP Best Corporation Co., LTD.
Registry	MA-L (24-bit, large block)
Country	TH
Example MAC	B4:05:66:00:00:00

What this means

The IEEE assigned the MA-L block B40566 to SP Best Corporation 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 B4:05:66, it is SP Best Corporation Co., LTD. hardware.

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