Who owns MAC prefix 8C5DB20?

8C5DB20 is registered to NPP NTT LLC in the IEEE MA-M registry.

What devices use 8C5DB20?

Any network device with a MAC address starting 8C:5D:B2:0 was manufactured by or for NPP NTT LLC.

MA-M · OUI prefix

NPP NTT LLC

Any MAC address starting 8C:5D:B2:0 is registered to NPP NTT LLC in RU.

OUI prefix	8C5DB20
Vendor	NPP NTT LLC
Registry	MA-M (28-bit, medium block)
Country	RU
Example MAC	8C:5D:B2:0:00:00:00

What this means

The IEEE assigned the MA-M block 8C5DB20 to NPP NTT LLC. 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 8C:5D:B2:0, it is NPP NTT LLC hardware.

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