Who owns MAC prefix D425CCC?

D425CCC is registered to POSNET Polska S.A. in the IEEE MA-M registry.

What devices use D425CCC?

Any network device with a MAC address starting D4:25:CC:C was manufactured by or for POSNET Polska S.A..

MA-M · OUI prefix

POSNET Polska S.A.

Any MAC address starting D4:25:CC:C is registered to POSNET Polska S.A. in PL.

OUI prefix	D425CCC
Vendor	POSNET Polska S.A.
Registry	MA-M (28-bit, medium block)
Country	PL
Example MAC	D4:25:CC:C:00:00:00

What this means

The IEEE assigned the MA-M block D425CCC to POSNET Polska S.A.. 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 D4:25:CC:C, it is POSNET Polska S.A. hardware.

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