Who owns MAC prefix 0003DE?

0003DE is registered to OTC Wireless in the IEEE MA-L registry.

What devices use 0003DE?

Any network device with a MAC address starting 00:03:DE was manufactured by or for OTC Wireless.

MA-L · OUI prefix

OTC Wireless

Any MAC address starting 00:03:DE is registered to OTC Wireless in US.

OUI prefix	0003DE
Vendor	OTC Wireless
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:03:DE:00:00:00

What this means

The IEEE assigned the MA-L block 0003DE to OTC Wireless. 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 00:03:DE, it is OTC Wireless hardware.

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