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.
Frequently Asked Questions
Who owns MAC prefix 20B37F1?
20B37F1 is registered to TDK-Lambda UK in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. TDK-Lambda UK's block covers 1,048,576 addresses.
What devices use 20B37F1?
Any network device with a MAC address starting 20:B3:7F:1 was manufactured by or for TDK-Lambda UK.