What this means
The IEEE assigned the MA-L block 7CEF61 to STR Elektronik Josef Schlechtinger GmbH. 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 7C:EF:61, it is STR Elektronik Josef Schlechtinger GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 7CEF61?
7CEF61 is registered to STR Elektronik Josef Schlechtinger GmbH 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. STR Elektronik Josef Schlechtinger GmbH's block covers 16,777,216 addresses.
What devices use 7CEF61?
Any network device with a MAC address starting 7C:EF:61 was manufactured by or for STR Elektronik Josef Schlechtinger GmbH.