What this means
The IEEE assigned the MA-M block 20B37F0 to B810 SPA. 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:0, it is B810 SPA hardware.
Frequently Asked Questions
Who owns MAC prefix 20B37F0?
20B37F0 is registered to B810 SPA 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. B810 SPA's block covers 1,048,576 addresses.
What devices use 20B37F0?
Any network device with a MAC address starting 20:B3:7F:0 was manufactured by or for B810 SPA.