Who owns MAC prefix D4945A?

D4945A is registered to COSMO CO., LTD in the IEEE MA-L registry.

What devices use D4945A?

Any network device with a MAC address starting D4:94:5A was manufactured by or for COSMO CO., LTD.

MA-L · OUI prefix

COSMO CO., LTD

Any MAC address starting D4:94:5A is registered to COSMO CO., LTD in JP.

OUI prefix	D4945A
Vendor	COSMO CO., LTD
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	D4:94:5A:00:00:00

What this means

The IEEE assigned the MA-L block D4945A to COSMO 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 D4:94:5A, it is COSMO CO., LTD hardware.

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