Who owns MAC prefix 58CF4B?

58CF4B is registered to Lufkin Industries in the IEEE MA-L registry.

What devices use 58CF4B?

Any network device with a MAC address starting 58:CF:4B was manufactured by or for Lufkin Industries.

MA-L · OUI prefix

Lufkin Industries

Any MAC address starting 58:CF:4B is registered to Lufkin Industries in US.

OUI prefix	58CF4B
Vendor	Lufkin Industries
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	58:CF:4B:00:00:00

What this means

The IEEE assigned the MA-L block 58CF4B to Lufkin Industries. 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 58:CF:4B, it is Lufkin Industries hardware.

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