What this means
The IEEE assigned the MA-L block 6CDDEF to EPCOMM 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 6C:DD:EF, it is EPCOMM Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 6CDDEF?
6CDDEF is registered to EPCOMM 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. EPCOMM Inc.'s block covers 16,777,216 addresses.
What devices use 6CDDEF?
Any network device with a MAC address starting 6C:DD:EF was manufactured by or for EPCOMM Inc..