Who owns MAC prefix 803457?

803457 is registered to OT Systems Limited in the IEEE MA-L registry.

What devices use 803457?

Any network device with a MAC address starting 80:34:57 was manufactured by or for OT Systems Limited.

MA-L · OUI prefix

OT Systems Limited

Any MAC address starting 80:34:57 is registered to OT Systems Limited in HK.

OUI prefix	803457
Vendor	OT Systems Limited
Registry	MA-L (24-bit, large block)
Country	HK
Example MAC	80:34:57:00:00:00

What this means

The IEEE assigned the MA-L block 803457 to OT Systems 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 80:34:57, it is OT Systems Limited hardware.

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