What this means
The IEEE assigned the MA-L block 1866F0 to Jupiter Systems. 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 18:66:F0, it is Jupiter Systems hardware.
Frequently Asked Questions
Who owns MAC prefix 1866F0?
1866F0 is registered to Jupiter Systems 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. Jupiter Systems's block covers 16,777,216 addresses.
What devices use 1866F0?
Any network device with a MAC address starting 18:66:F0 was manufactured by or for Jupiter Systems.