Who owns MAC prefix 904E91A?

904E91A is registered to Kaertech Limited in the IEEE MA-M registry.

What devices use 904E91A?

Any network device with a MAC address starting 90:4E:91:A was manufactured by or for Kaertech Limited.

MA-M · OUI prefix

Kaertech Limited

Any MAC address starting 90:4E:91:A is registered to Kaertech Limited in HK.

OUI prefix	904E91A
Vendor	Kaertech Limited
Registry	MA-M (28-bit, medium block)
Country	HK
Example MAC	90:4E:91:A:00:00:00

What this means

The IEEE assigned the MA-M block 904E91A to Kaertech 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 90:4E:91:A, it is Kaertech Limited hardware.

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