Who owns MAC prefix 20B37F1?

20B37F1 is registered to TDK-Lambda UK in the IEEE MA-M registry.

What devices use 20B37F1?

Any network device with a MAC address starting 20:B3:7F:1 was manufactured by or for TDK-Lambda UK.

MA-M · OUI prefix

TDK-Lambda UK

Any MAC address starting 20:B3:7F:1 is registered to TDK-Lambda UK in GB.

OUI prefix	20B37F1
Vendor	TDK-Lambda UK
Registry	MA-M (28-bit, medium block)
Country	GB
Example MAC	20:B3:7F:1:00:00:00

What this means

The IEEE assigned the MA-M block 20B37F1 to TDK-Lambda UK. 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 20:B3:7F:1, it is TDK-Lambda UK hardware.

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