Who owns MAC prefix 0050B1?

0050B1 is registered to GIDDINGS & LEWIS in the IEEE MA-L registry.

What devices use 0050B1?

Any network device with a MAC address starting 00:50:B1 was manufactured by or for GIDDINGS & LEWIS.

MA-L · OUI prefix

GIDDINGS & LEWIS

Any MAC address starting 00:50:B1 is registered to GIDDINGS & LEWIS in US.

OUI prefix	0050B1
Vendor	GIDDINGS & LEWIS
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:50:B1:00:00:00

What this means

The IEEE assigned the MA-L block 0050B1 to GIDDINGS & LEWIS. 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 00:50:B1, it is GIDDINGS & LEWIS hardware.

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