What this means
The IEEE assigned the MA-L block 70661B to Sonova AG. 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 70:66:1B, it is Sonova AG hardware.
Frequently Asked Questions
Who owns MAC prefix 70661B?
70661B is registered to Sonova AG 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. Sonova AG's block covers 16,777,216 addresses.
What devices use 70661B?
Any network device with a MAC address starting 70:66:1B was manufactured by or for Sonova AG.