Who owns MAC prefix 002091?

002091 is registered to J125, NATIONAL SECURITY AGENCY in the IEEE MA-L registry.

What devices use 002091?

Any network device with a MAC address starting 00:20:91 was manufactured by or for J125, NATIONAL SECURITY AGENCY.

MA-L · OUI prefix

J125, NATIONAL SECURITY AGENCY

Any MAC address starting 00:20:91 is registered to J125, NATIONAL SECURITY AGENCY in US.

OUI prefix	002091
Vendor	J125, NATIONAL SECURITY AGENCY
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:20:91:00:00:00

What this means

The IEEE assigned the MA-L block 002091 to J125, NATIONAL SECURITY AGENCY. 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 00:20:91, it is J125, NATIONAL SECURITY AGENCY hardware.

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