Who owns MAC prefix 90B4DD?

90B4DD is registered to ZPT R&D in the IEEE MA-L registry.

What devices use 90B4DD?

Any network device with a MAC address starting 90:B4:DD was manufactured by or for ZPT R&D.

MA-L · OUI prefix

ZPT R&D

Any MAC address starting 90:B4:DD is registered to ZPT R&D in SE.

OUI prefix	90B4DD
Vendor	ZPT R&D
Registry	MA-L (24-bit, large block)
Country	SE
Example MAC	90:B4:DD:00:00:00

What this means

The IEEE assigned the MA-L block 90B4DD to ZPT R&D. 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:B4:DD, it is ZPT R&D hardware.

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