Who owns MAC prefix D47C44B?

D47C44B is registered to OPTiM Corporation in the IEEE MA-M registry.

What devices use D47C44B?

Any network device with a MAC address starting D4:7C:44:B was manufactured by or for OPTiM Corporation.

MA-M · OUI prefix

OPTiM Corporation

Any MAC address starting D4:7C:44:B is registered to OPTiM Corporation in JP.

OUI prefix	D47C44B
Vendor	OPTiM Corporation
Registry	MA-M (28-bit, medium block)
Country	JP
Example MAC	D4:7C:44:B:00:00:00

What this means

The IEEE assigned the MA-M block D47C44B to OPTiM Corporation. 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 D4:7C:44:B, it is OPTiM Corporation hardware.

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