Who owns MAC prefix 5C87D81?

5C87D81 is registered to COMET SYSTEM, s.r.o. in the IEEE MA-M registry.

What devices use 5C87D81?

Any network device with a MAC address starting 5C:87:D8:1 was manufactured by or for COMET SYSTEM, s.r.o..

MA-M · OUI prefix

COMET SYSTEM, s.r.o.

Any MAC address starting 5C:87:D8:1 is registered to COMET SYSTEM, s.r.o. in CZ.

OUI prefix	5C87D81
Vendor	COMET SYSTEM, s.r.o.
Registry	MA-M (28-bit, medium block)
Country	CZ
Example MAC	5C:87:D8:1:00:00:00

What this means

The IEEE assigned the MA-M block 5C87D81 to COMET SYSTEM, s.r.o.. 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 5C:87:D8:1, it is COMET SYSTEM, s.r.o. hardware.

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