Who owns MAC prefix 000439?

000439 is registered to Rosco Entertainment Technology, Inc. in the IEEE MA-L registry.

What devices use 000439?

Any network device with a MAC address starting 00:04:39 was manufactured by or for Rosco Entertainment Technology, Inc..

MA-L · OUI prefix

Rosco Entertainment Technology, Inc.

Any MAC address starting 00:04:39 is registered to Rosco Entertainment Technology, Inc. in US.

OUI prefix	000439
Vendor	Rosco Entertainment Technology, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:04:39:00:00:00

What this means

The IEEE assigned the MA-L block 000439 to Rosco Entertainment Technology, Inc.. 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 00:04:39, it is Rosco Entertainment Technology, Inc. hardware.

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