Who owns MAC prefix 40FF40?

40FF40 is registered to GloquadTech in the IEEE MA-L registry.

What devices use 40FF40?

Any network device with a MAC address starting 40:FF:40 was manufactured by or for GloquadTech.

MA-L · OUI prefix

GloquadTech

Any MAC address starting 40:FF:40 is registered to GloquadTech in KR.

OUI prefix	40FF40
Vendor	GloquadTech
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	40:FF:40:00:00:00

What this means

The IEEE assigned the MA-L block 40FF40 to GloquadTech. 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 40:FF:40, it is GloquadTech hardware.

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