What this means
The IEEE assigned the MA-L block 08003F to FRED KOSCHARA ENTERPRISES. 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 08:00:3F, it is FRED KOSCHARA ENTERPRISES hardware.
Frequently Asked Questions
Who owns MAC prefix 08003F?
08003F is registered to FRED KOSCHARA ENTERPRISES 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. FRED KOSCHARA ENTERPRISES's block covers 16,777,216 addresses.
What devices use 08003F?
Any network device with a MAC address starting 08:00:3F was manufactured by or for FRED KOSCHARA ENTERPRISES.