Who owns MAC prefix D420005?

D420005 is registered to Monolith Electric?Changzhou?Co.,Ltd. in the IEEE MA-M registry.

What devices use D420005?

Any network device with a MAC address starting D4:20:00:5 was manufactured by or for Monolith Electric?Changzhou?Co.,Ltd..

MA-M · OUI prefix

Monolith Electric?Changzhou?Co.,Ltd.

Any MAC address starting D4:20:00:5 is registered to Monolith Electric?Changzhou?Co.,Ltd. in CN.

OUI prefix	D420005
Vendor	Monolith Electric?Changzhou?Co.,Ltd.
Registry	MA-M (28-bit, medium block)
Country	CN
Example MAC	D4:20:00:5:00:00:00

What this means

The IEEE assigned the MA-M block D420005 to Monolith Electric?Changzhou?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 D4:20:00:5, it is Monolith Electric?Changzhou?Co.,Ltd. hardware.

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