Who owns MAC prefix 00057C?

00057C is registered to RCO Security AB in the IEEE MA-L registry.

What devices use 00057C?

Any network device with a MAC address starting 00:05:7C was manufactured by or for RCO Security AB.

MA-L · OUI prefix

RCO Security AB

Any MAC address starting 00:05:7C is registered to RCO Security AB in SE.

OUI prefix	00057C
Vendor	RCO Security AB
Registry	MA-L (24-bit, large block)
Country	SE
Example MAC	00:05:7C:00:00:00

What this means

The IEEE assigned the MA-L block 00057C to RCO Security AB. 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 00:05:7C, it is RCO Security AB hardware.

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