Who owns MAC prefix 0040F5?

0040F5 is registered to OEM ENGINES in the IEEE MA-L registry.

What devices use 0040F5?

Any network device with a MAC address starting 00:40:F5 was manufactured by or for OEM ENGINES.

MA-L · OUI prefix

OEM ENGINES

Any MAC address starting 00:40:F5 is registered to OEM ENGINES in US.

OUI prefix	0040F5
Vendor	OEM ENGINES
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:40:F5:00:00:00

What this means

The IEEE assigned the MA-L block 0040F5 to OEM ENGINES. 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 00:40:F5, it is OEM ENGINES hardware.

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