Who owns MAC prefix D440D0?

D440D0 is registered to OCOSMOS Co., LTD in the IEEE MA-L registry.

What devices use D440D0?

Any network device with a MAC address starting D4:40:D0 was manufactured by or for OCOSMOS Co., LTD.

MA-L · OUI prefix

OCOSMOS Co., LTD

Any MAC address starting D4:40:D0 is registered to OCOSMOS Co., LTD in KR.

OUI prefix	D440D0
Vendor	OCOSMOS Co., LTD
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	D4:40:D0:00:00:00

What this means

The IEEE assigned the MA-L block D440D0 to OCOSMOS 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 D4:40:D0, it is OCOSMOS Co., LTD hardware.

Look up another MAC