What this means
The IEEE assigned the MA-L block 001B9B to Hose-McCann Communications. 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 00:1B:9B, it is Hose-McCann Communications hardware.
Frequently Asked Questions
Who owns MAC prefix 001B9B?
001B9B is registered to Hose-McCann Communications 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. Hose-McCann Communications's block covers 16,777,216 addresses.
What devices use 001B9B?
Any network device with a MAC address starting 00:1B:9B was manufactured by or for Hose-McCann Communications.