Who owns MAC prefix 002140?

002140 is registered to EN Technologies Inc. in the IEEE MA-L registry.

What devices use 002140?

Any network device with a MAC address starting 00:21:40 was manufactured by or for EN Technologies Inc..

MA-L · OUI prefix

EN Technologies Inc.

Any MAC address starting 00:21:40 is registered to EN Technologies Inc. in KR.

OUI prefix	002140
Vendor	EN Technologies Inc.
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	00:21:40:00:00:00

What this means

The IEEE assigned the MA-L block 002140 to EN Technologies Inc.. 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 00:21:40, it is EN Technologies Inc. hardware.

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