What this means
The IEEE assigned the MA-L block 00402C to ISIS DISTRIBUTED SYSTEMS, INC.. 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 00:40:2C, it is ISIS DISTRIBUTED SYSTEMS, INC. hardware.
Frequently Asked Questions
Who owns MAC prefix 00402C?
00402C is registered to ISIS DISTRIBUTED SYSTEMS, INC. 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. ISIS DISTRIBUTED SYSTEMS, INC.'s block covers 16,777,216 addresses.
What devices use 00402C?
Any network device with a MAC address starting 00:40:2C was manufactured by or for ISIS DISTRIBUTED SYSTEMS, INC..