Who owns MAC prefix 00197B?

00197B is registered to Picotest Corp. in the IEEE MA-L registry.

What devices use 00197B?

Any network device with a MAC address starting 00:19:7B was manufactured by or for Picotest Corp..

MA-L · OUI prefix

Picotest Corp.

Any MAC address starting 00:19:7B is registered to Picotest Corp. in TW.

OUI prefix	00197B
Vendor	Picotest Corp.
Registry	MA-L (24-bit, large block)
Country	TW
Example MAC	00:19:7B:00:00:00

What this means

The IEEE assigned the MA-L block 00197B to Picotest Corp.. 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 00:19:7B, it is Picotest Corp. hardware.

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