What this means
The IEEE assigned the MA-L block 00239F to Institut für Prüftechnik. 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 00:23:9F, it is Institut für Prüftechnik hardware.
Frequently Asked Questions
Who owns MAC prefix 00239F?
00239F is registered to Institut für Prüftechnik 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. Institut für Prüftechnik's block covers 16,777,216 addresses.
What devices use 00239F?
Any network device with a MAC address starting 00:23:9F was manufactured by or for Institut für Prüftechnik.