What this means
The IEEE assigned the MA-L block 001219 to General Datacomm LLC. 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 00:12:19, it is General Datacomm LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 001219?
001219 is registered to General Datacomm LLC 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. General Datacomm LLC's block covers 16,777,216 addresses.
What devices use 001219?
Any network device with a MAC address starting 00:12:19 was manufactured by or for General Datacomm LLC.