What this means
The IEEE assigned the MA-L block EC7D9D to CPI. 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 EC:7D:9D, it is CPI hardware.
Frequently Asked Questions
Who owns MAC prefix EC7D9D?
EC7D9D is registered to CPI 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. CPI's block covers 16,777,216 addresses.
What devices use EC7D9D?
Any network device with a MAC address starting EC:7D:9D was manufactured by or for CPI.