Who owns MAC prefix 20DF3F?

20DF3F is registered to Nanjing SAC Power Grid Automation Co., Ltd. in the IEEE MA-L registry.

What devices use 20DF3F?

Any network device with a MAC address starting 20:DF:3F was manufactured by or for Nanjing SAC Power Grid Automation Co., Ltd..

MA-L · OUI prefix

Nanjing SAC Power Grid Automation Co., Ltd.

Any MAC address starting 20:DF:3F is registered to Nanjing SAC Power Grid Automation Co., Ltd. in CN.

OUI prefix	20DF3F
Vendor	Nanjing SAC Power Grid Automation Co., Ltd.
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	20:DF:3F:00:00:00

What this means

The IEEE assigned the MA-L block 20DF3F to Nanjing SAC Power Grid Automation Co., Ltd.. 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:DF:3F, it is Nanjing SAC Power Grid Automation Co., Ltd. hardware.

Other Nanjing SAC Power Grid Automation Co., Ltd. prefixes

Nanjing SAC Power Grid Automation Co., Ltd. holds 2 registered blocks in total.

6C8366

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