What this means
The IEEE assigned the MA-L block 18193F to Tamtron Oy. 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 18:19:3F, it is Tamtron Oy hardware.
Frequently Asked Questions
Who owns MAC prefix 18193F?
18193F is registered to Tamtron Oy 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. Tamtron Oy's block covers 16,777,216 addresses.
What devices use 18193F?
Any network device with a MAC address starting 18:19:3F was manufactured by or for Tamtron Oy.