Who owns MAC prefix 003023?

003023 is registered to COGENT COMPUTER SYSTEMS, INC. in the IEEE MA-L registry.

What devices use 003023?

Any network device with a MAC address starting 00:30:23 was manufactured by or for COGENT COMPUTER SYSTEMS, INC..

MA-L · OUI prefix

COGENT COMPUTER SYSTEMS, INC.

Any MAC address starting 00:30:23 is registered to COGENT COMPUTER SYSTEMS, INC. in US.

OUI prefix	003023
Vendor	COGENT COMPUTER SYSTEMS, INC.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:30:23:00:00:00

What this means

The IEEE assigned the MA-L block 003023 to COGENT COMPUTER SYSTEMS, 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 00:30:23, it is COGENT COMPUTER SYSTEMS, INC. hardware.

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