Who owns MAC prefix 6CB4A7?

6CB4A7 is registered to Landauer, Inc. in the IEEE MA-L registry.

What devices use 6CB4A7?

Any network device with a MAC address starting 6C:B4:A7 was manufactured by or for Landauer, Inc..

MA-L · OUI prefix

Landauer, Inc.

Any MAC address starting 6C:B4:A7 is registered to Landauer, Inc. in US.

OUI prefix	6CB4A7
Vendor	Landauer, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	6C:B4:A7:00:00:00

What this means

The IEEE assigned the MA-L block 6CB4A7 to Landauer, 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 6C:B4:A7, it is Landauer, Inc. hardware.

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