Who owns MAC prefix 001B81?

001B81 is registered to DATAQ Instruments, Inc. in the IEEE MA-L registry.

What devices use 001B81?

Any network device with a MAC address starting 00:1B:81 was manufactured by or for DATAQ Instruments, Inc..

MA-L · OUI prefix

DATAQ Instruments, Inc.

Any MAC address starting 00:1B:81 is registered to DATAQ Instruments, Inc. in US.

OUI prefix	001B81
Vendor	DATAQ Instruments, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:1B:81:00:00:00

What this means

The IEEE assigned the MA-L block 001B81 to DATAQ Instruments, 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 00:1B:81, it is DATAQ Instruments, Inc. hardware.

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