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.
Frequently Asked Questions
Who owns MAC prefix 000439?
000439 is registered to Rosco Entertainment Technology, Inc. in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Rosco Entertainment Technology, Inc.'s block covers 16,777,216 addresses.
What devices use 000439?
Any network device with a MAC address starting 00:04:39 was manufactured by or for Rosco Entertainment Technology, Inc..