What this means
The IEEE assigned the MA-L block 00191B to Sputnik Engineering AG. 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 00:19:1B, it is Sputnik Engineering AG hardware.
Frequently Asked Questions
Who owns MAC prefix 00191B?
00191B is registered to Sputnik Engineering AG 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. Sputnik Engineering AG's block covers 16,777,216 addresses.
What devices use 00191B?
Any network device with a MAC address starting 00:19:1B was manufactured by or for Sputnik Engineering AG.