What this means
The IEEE assigned the MA-L block 7CDDE9 to ATOM tech 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 7C:DD:E9, it is ATOM tech Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 7CDDE9?
7CDDE9 is registered to ATOM tech 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. ATOM tech Inc.'s block covers 16,777,216 addresses.
What devices use 7CDDE9?
Any network device with a MAC address starting 7C:DD:E9 was manufactured by or for ATOM tech Inc..