What this means
The IEEE assigned the MA-L block CC5D57 to Information System Research Institute,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 CC:5D:57, it is Information System Research Institute,Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix CC5D57?
CC5D57 is registered to Information System Research Institute,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. Information System Research Institute,Inc.'s block covers 16,777,216 addresses.
What devices use CC5D57?
Any network device with a MAC address starting CC:5D:57 was manufactured by or for Information System Research Institute,Inc..