What this means
The IEEE assigned the MA-L block 002188 to EMC Corporation. 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 00:21:88, it is EMC Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 002188?
002188 is registered to EMC Corporation 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. EMC Corporation's block covers 16,777,216 addresses.
What devices use 002188?
Any network device with a MAC address starting 00:21:88 was manufactured by or for EMC Corporation.