Who owns MAC prefix 78303B?

78303B is registered to Stephen Technologies Co.,Limited in the IEEE MA-L registry.

What devices use 78303B?

Any network device with a MAC address starting 78:30:3B was manufactured by or for Stephen Technologies Co.,Limited.

MA-L · OUI prefix

Stephen Technologies Co.,Limited

Any MAC address starting 78:30:3B is registered to Stephen Technologies Co.,Limited in CN.

OUI prefix	78303B
Vendor	Stephen Technologies Co.,Limited
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	78:30:3B:00:00:00

What this means

The IEEE assigned the MA-L block 78303B to Stephen Technologies Co.,Limited. 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 78:30:3B, it is Stephen Technologies Co.,Limited hardware.

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