What devices use C4C19F?

Any network device with a MAC address starting C4:C1:9F was manufactured by or for National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO).

MA-L · OUI prefix

National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO)

Q: Who owns MAC prefix C4C19F?

C4C19F is registered to National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO) in the IEEE MA-L registry.

Any MAC address starting C4:C1:9F is registered to National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO) in US.

OUI prefix	C4C19F
Vendor	National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO)
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	C4:C1:9F:00:00:00

What this means

The IEEE assigned the MA-L block C4C19F to National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO). 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 C4:C1:9F, it is National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO) hardware.

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