Who owns MAC prefix 0020CB?

0020CB is registered to PRETEC ELECTRONICS CORP. in the IEEE MA-L registry.

What devices use 0020CB?

Any network device with a MAC address starting 00:20:CB was manufactured by or for PRETEC ELECTRONICS CORP..

MA-L · OUI prefix

PRETEC ELECTRONICS CORP.

Any MAC address starting 00:20:CB is registered to PRETEC ELECTRONICS CORP. in US.

OUI prefix	0020CB
Vendor	PRETEC ELECTRONICS CORP.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:20:CB:00:00:00

What this means

The IEEE assigned the MA-L block 0020CB to PRETEC ELECTRONICS CORP.. 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 00:20:CB, it is PRETEC ELECTRONICS CORP. hardware.

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