What this means
The IEEE assigned the MA-L block 20858C to Assa. 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 20:85:8C, it is Assa hardware.
Frequently Asked Questions
Who owns MAC prefix 20858C?
20858C is registered to Assa 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. Assa's block covers 16,777,216 addresses.
What devices use 20858C?
Any network device with a MAC address starting 20:85:8C was manufactured by or for Assa.