What this means
The IEEE assigned the MA-L block 001B19 to IEEE I&M Society TC9. 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:19, it is IEEE I&M Society TC9 hardware.
Frequently Asked Questions
Who owns MAC prefix 001B19?
001B19 is registered to IEEE I&M Society TC9 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. IEEE I&M Society TC9's block covers 16,777,216 addresses.
What devices use 001B19?
Any network device with a MAC address starting 00:1B:19 was manufactured by or for IEEE I&M Society TC9.