What this means
The IEEE assigned the MA-L block 0090DC to TECO INFORMATION 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 00:90:DC, it is TECO INFORMATION SYSTEMS hardware.
Frequently Asked Questions
Who owns MAC prefix 0090DC?
0090DC is registered to TECO INFORMATION 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. TECO INFORMATION SYSTEMS's block covers 16,777,216 addresses.
What devices use 0090DC?
Any network device with a MAC address starting 00:90:DC was manufactured by or for TECO INFORMATION SYSTEMS.