What this means
The IEEE assigned the MA-L block 3CF7D1 to OMRON 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 3C:F7:D1, it is OMRON Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 3CF7D1?
3CF7D1 is registered to OMRON 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. OMRON Corporation's block covers 16,777,216 addresses.
What devices use 3CF7D1?
Any network device with a MAC address starting 3C:F7:D1 was manufactured by or for OMRON Corporation.