What this means
The IEEE assigned the MA-L block B83A9D to Alarm.com. 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 B8:3A:9D, it is Alarm.com hardware.
Frequently Asked Questions
Who owns MAC prefix B83A9D?
B83A9D is registered to Alarm.com 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. Alarm.com's block covers 16,777,216 addresses.
What devices use B83A9D?
Any network device with a MAC address starting B8:3A:9D was manufactured by or for Alarm.com.